Ive had intercourse with my boyfriend not long ago and my he ejaculated inside of me but since then my stomaches been getting bigger & I haven't eaten that much ,today I got my period but have had headaches & nausea the whole day I don't know what this could be

It takes 3-4 months before you would even begin to show (and that doesn't qualify as not long ago)... so that means its gas. Meaning you ate something that gave you a lot of intestinal gas. Or just a bad case of bloating from other reasons.


However if you miss your next period... wait another two weeks and take a test when you wake up... the first time you pee. To find out if you are pregnant or not.


But this time you got your period... so you dodged the bullet.