confused with cycle after a miscarriage and pain i have? i do have pcos but scan showed my ovaries to be norma I am wondering if anyone can help me with this, i miscarried on 10th jan. my next period came 26th feb which was slightly longer and heavier than normal. 
i now calculate i am 3/4 days overdue but a pregnancy test was negative 2 days ago! today i have started to experience cramping, but not my usual period cramps, it more localised like it was during my miscarriage.. but i also have stabbing pains in my right lower abdomen.. from quite bad i cant move to almost nothing allday.. they havent stopped.. i am also very tired and have been for a few days and the last week i have been feeling very moody and low.. when i did the positive pregnancy test before it was on day 35 and i spotted the day before which i have taken as the day it implanted.. and i have read that u dont start producing many hcg until implantation has taken place..could this be why a test 2 days ago was negative? could the pain in the side be ectopic? i have no spotting..could i just not be back to normal?

Summarized question: Are stabbing pains in the right lower abdomen, tiredness, and low mood symptoms of pregnancy?