this is my second day on my period and something is seriously wrong with me

This period isn't as heavy it did come 2 day early but I just don't feel the same I never throw up I have the best stomach when it comes to not throwing up this is my first meal all day and I can't stop throwing up now !! While I was eating I was feeling so sick I just had to throw up I couldn't finish it Idk what's going on with me I don't feel normal is it possible to be pregnant while on your period ?
I just tested it said negative should I wait to test again ?

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