"...pooped 3 times in the last couple days after not going for a whole week..."?
That's quite frequent...snakes often don't even go on a weekly basis, fyi. It sounds like something is irritating her digestive tract to make her go so often.
It's alarming to find any amount of blood, for sure, but that's not a whole lot of blood at least. You should get her (or him) seen by a reptile vet A.S.A.P. with
the saved sample. I totally agree with Armiyana's post above. Don't panic, but don't ignore this...bad luck having this happen over the weekend, you might
not get seen until Monday. (that's the kind of luck I have too...)