Nauseous

natalta

So im on day 1 of my period, its pretty heavy. For the past 3 days ive had a really bad headache and ive been nauseous for the past 3 days. My nausea is worse in the morning and at night. The last time i had sex was the 9th of january. Dont think you can start your period while pregnant but im so confused and this feeling is so uncomfortable