Me and my OH had sex a few days before I started my period, I can't remember the exact amount of time, maybe a week or so before I started my period which was 3 days ago. I wasn't trying but wasn't preventing with my first pregnancy, got pregnant in 3 month and I was sick from start to finish and could barely eat. Well today I've been sick and showing flu like symptoms, aching bones, feeling hot then cold and being sick amongst others... I'm never like this on a period.