On day 04 After receiving the 2nd Covid 19 Pfizer vaccine, I experienced a deep pain in my upper inner right thigh around 0600 am of the 16th of January. At the same time my calf muscle of that same right leg was in pain.  I thought it to be muscular pain as I was told by the reading material regarding symptoms of the covid 19 vaccine there could be aches an pains attributed to the 2nd shot.  I used a deep heating rub on both areas of my right leg and put heat on them to treat the soreness.  This occured over the next few days feeling this pain in my right leg and treated the same way applying heat. Within about 24 hours of the pain in my legs I started experiencing a shortness of breath while walking up and down st.  On day 04 After receiving the 2nd Covid 19 Pfizer vaccine, I experienced a deep pain in my upper inner right thigh around 0600 am of the 16th of January. At the same time my calf muscle of that same right leg was in pain.  I thought it to be muscular pain as I was told by the reading material regarding symptoms of the covid 19 vaccine there could be aches an pains attributed to the 2nd shot.  I used a deep heating rub on both areas of my right leg and put heat on them to treat the soreness.  This occured over the next few days feeling this pain in my right leg and treated the same way applying heat. Within about 24 hours of the pain in my legs I started experiencing a shortness of breath while walking up and down stairs as part of my daily activities.  The symptoms of shortness of breath only seemed to appear when I was on any form of extended walking activity or physical movements or exercise this would of have been starting around the 17th of January.  The right leg pain was masked by the heating rub while the shortness of breath continued for the next few days.  On the 19th of January,  I went to an Urgent Care Facility at 0800 am to see a Medical professional to discuss my symptoms I was previously experiencing and to figure out why I was having a shortness of breath and the pain in my right leg.  The on staff Physician's Assistant had a Nurse conduct a Covid 19 Rapids test (negative) and a second swab was administered and sent to the Lab.  Which produced a (negative for Covid 19) on the 20th of January.  An Xray was not taken to determine my shortness of breath.  The Dr listened to my lungs and heart,  though I did let the PA know I had received both Pfizer shots and when they were administered.  I was carrying My Shot record for the vaccine with the dates and lot number.   He didnt appear to be interested in further diagnosis and made sure I had the paperwork to track the results of my Covid swab sent to the lab. The visit was completed and I was released to go back to work/home.    I carried on the symptoms of the shortness of breath from the 19th of January to the 22nd of January monitoring my O2 (oxygen levels) with a pulse oximeter.  They ranged from 90-93.  On the evening of the 22nd of January I was becoming very uncomfortable with my breathing climbing the stairs in my home and monitored my O2 readings with the oximeter on my finger when walking upstairs and they dropped down to 60-65.  My wife drove me to the emergency room at Hospital.  I walked into the ER and checked myself in for shortness of breath and leg pain in my right leg.  I was admitted into the emergency room and put on 15 litres of oxygen.  The emergency room Dr ordered a chest Xray,  Cat Scan of my chest and heart and a sonogram of my right leg.  The testing results came back with a noted large pulmonary emboli on my lungs/heart area and blood clots throughout my right leg (right lower extremity DVT).    Surgery was performed to remove the pulmonary emboli and I was put on a Heprin Drip to thin out my blood for the remaining clots in my chest and my right leg. The attending physician ordered a T.E.E. (transesophageal Echocardiogram) to observe my heart functions.  I was told the TEE did not demonstrate any further recommend surgeries.  I was administered a test for my cardio and heart functions prior to my discharge on 27 January 2021.   I was prescribed Eloquis for maintenance medication to be monitored by followup visits to my cardiologist and Hemotologist within the next few weeks.  I have not family or personal history of Blood Clots.  I do perform administrative duties as part of my job, which requires sitting and working on a computer.  Note however I move around very often during a work day and operate a farm tractor and have an active life style.  I have not recently had any extended trips more than 2 hours nor have I flown within the past year or so.