I had my periods on the 4th April and finished on the 12th, come the 14th May I found out I was pregnant. But there is a hiccup, I actually broke up with my boyfriend for a couple of days on the 29th and 30th of April and on the 30 of April I had had sex with my ex just once, but apart from that it was only with my boyfriend who I am now back with. Generally you would take it from the first day of your last period to estimate how far along you are which means on the 1st July I should have been 12 weeks and 4 days but I had a scan and it showed 10 weeks and 2 days. Have I totally screwed up here and am I pregnant to my ex? Or are the dates out, because it's saying that I would have had to fall pregnant around the 4th of May which was the day my period was due again? I need a little piece of mind here so I can make the proper decsions. PLEASE HELP