For the past two weeks I have been feeling nauseated a day after sex. This is all new to me since my partner and I have been doing this for the past 5 months.

I just get very nauseated and my breasts hurts. After I eat I just want to vomit. I even did a pregnancy test and it came out negative

What could be going on?

I won’t be able to see my ob gyn until February that was the soonest I could get in