I had unprotected sex the day after my period stopped. That was 10 days ago and I have this aching pain sort of like cramps but different, slight and erratic nausea (mainly at bedtime Usually I associate these feelings with PMS but I've still got 2 / 3 weeks to go and I never get it this early. I took a at home pregnant. Test and it came back negative. I'm confused.

You could just have a stomach bug. I know it has been going around, my husband and my brother both have it.

It would be too early to determine if you are pregnant or not.