So my period is normally 28 day roughly and last about 7 days. My last normal period was from 4/21/17 until 4/28/17 which is 7 days. Then all the sudden it started on 5/14/17 and ended on 5/19/17 which is only 5 days. This last one was a lot of off and on and really light (not my normal). The last 2 times my fiance and I had sexual intercourse was 4/30/17 and 5/17/17. I thought it maybe implantation bleeding but I'm not sure, I tried to consult my PCP but hes been to booked up.