20! Scared! Pregnant?

okay so basically I've been having stomach pain and far more frequent bowle movements and have for about two weeks now. on the 17th and 18th i had blood in my stool then no movements for two days and now it is 1-3 times a day (no blood) I've talked to many pregnant ladys and almost all of them said they have more frequent bowl movements on top of everything else.

I have almost all of the other pregnancy signs, asside from brest tenderness (which normally comes before my period and it isnt this time), irrational mood swings, queezyness all of the time, frequent urinating, being tired, foods either being appealing or shockingly nausiating, likeing sents i usually hate and feeling sick or just getting a headache for the ones i used to like, heart burn followed by hickups (all the friggen time) lower back pain and the general feeling that something isnt normal.

my period starts saturday is tomorrow too early to take a pregnancy test? (i want to because my, now ex bf thanks to a mood swing) leaves tomorrow night at the latest)