Inderterminable hcg blood test??

Destiny
Well I got two faint positives on at home pregnancy tests. So I went to the doctor to get a blood test done. They made me do a urine test first even though I drank a lot of water right before that and it was negative. So they took my blood and it came back as abnormal and indeterminable. Has anyone had that happen and know what it means? They are having me come back Saturday and redo the blood test. But I got a strange period yesterday so idk what to think! Just need some advice.