HI, I had sex with someone about 10 weeks ago, I took two pregnancy tests that were both negative and came on my period as normal.
I recently got back with my ex long term partner and am now pregnant, I'm told I am aprox 6 weeks pregnant. Is there still a chance it's the first man or not

Your best bet is to get a dna test when the baby born, and tell both men what's going on?

Well its probably who ever u had sex with around 6 weeks ago. If u only had sex with the first guy 10 weeks ago then its more than likely not him.