I've been trying to concieve for months now and I have had unprotected sex in my fertile weeks this month. Ive been vomiting for the past two days and having bad abdominal pains. My last period was around the 25th of June, I have had a bit of bleeding today but its early and it has been on and off. I usuallly have very heavy periods and this is very light for me. Could i be pregnant or am I just having period cramps? Thanks!