had a "knot in her breast", on the "left side", which is the side she received the vaccine on.; bad migraine; swollen and painful knot to left breast; swollen and painful knot to left breast; Chills; This is a spontaneous report from a contactable consumer (patient) reported herself. A 50-years-old female patient received BNT162B2 (Pfizer-BioNTech Covid-19 Vaccine, Solution for injection, batch/lot number: unknown), via an unknown route of administration in left arm on 01May2021 (at the age of 50-years-old) as dose 2, single for COVID-19 immunisation. Vaccine Providing Facility: Not provided. The patient's medical history included high blood pressure (diagnosed 14 years ago, it came during pregnancy and never went away) and high cholesterol (diagnosed maybe 7 years ago). Concomitant medication was not reported. The patient had no other vaccinations the same days as she had the Pfizer COVID-19 vaccinations or in the four weeks prior. She has started no new meds. The patient received BNT162B2 (Pfizer-BioNTech Covid-19 Vaccine, Solution for injection, batch/lot number and expiry date: unknown) on 10Apr2021 (at the age of 50-years-old) as dose 1, single as historical vaccine for COVID-19 immunisation. The patient got the second shot on Saturday and yesterday on 02May2021, she had a "knot in her breast", on the "left side", which is the side she received the vaccine on. She said it was "tender to the touch". After getting second dose she had a really bad migraine when she woke up Sunday 02May, it started as a slight headache and a couple hours later it was a migraine that lasted almost all day. She said she was taking Tylenol, drinking fluids and took flu medication because she had chills and felt cold to her bones. She said this started 02May2021, and it got better, her migraine was gone today but it lasted into the night last night. She said that she also had to her left breast on the same side she got the shot a knot and it was swollen and painful. Swollen and painful knot to left breast, it was there when she woke up, it was not there when she went to sleep. She said she has had it since yesterday morning, it has not gotten better, it was swollen so it was worse, and tender to the touch. She has done no treatment, she could not do anything yesterday with her head hurting, and she did not want to ask anyone to take her to the doctor, she did not want to open her eyes and wanted to lay down. The patient informed that she got her second shot of the Pfizer COVID-19 vaccine 01May, and her first one was three weeks prior on 10Apr. She said she did not have her vaccine card with her to provide NDC/LOT/EXP for either dose. Treatment received Tylenol (Expiry date: Oct2021, Lot number: OCR0410,) 650 mg, took two tablets, three times yesterday, every 5 hours. Coricidin HBP: this was the flu medication it was for people who have high blood pressure, it was the Coricidin HBP Maximum Strength Cold and Flu liquid gels. She said that it has 325mg Acetaminophen, 10mg Dextromethorphan, and 200mg Guaifenesin as an expectorant.  She says she was ok after she took 4 in two doses (Expiry date: Jan2022, Lot number: NAA8ER9). The outcome of the event bad migraine' and Chills' was recovered on 02May2021, the outcome of the event swollen and painful knot to left breast' was not recovered. The outcome of the remaining event was unknown.  No follow-up attempts are possible; information about lot/batch number cannot be obtained.