Right had sex with an ex just be4 we split in the 11th March. ..last period was the 24th march...had sex with my bf on the 9th April...I done a test Tuesday last week an sed positive...but I've read that I shouldn't get any signs yet but my boobs are sore an heavy...so my question is how far gone am I an is it my ex or bf baby?
Having sex on the 9th of April, would have been about day 16 of your cycle and you were likely very fertile.
So, you would have conceived a few days later - it's not instantaneous.
Your doctor should base the dates off of your LMP, so you'd be about 6 weeks along, 4 weeks gestation.
Hope it helps.