HELP!!!

Elizabeth • Elizabeth Kohm,pop punk is life ✌🏼️
So tonight I'm hanging out with a friend I haven't seen in years! So she goes and buys us alcohol so we're having a free beers no big deal I go into the bath room and my discharge has blood in it (I got off my period 1 week ago) and I feel suddenly sick and every times I burped I would puke a little what should I do?!? Could I be pregnant