9 days late, Negative home test, positive HCG

My period is 9 days late. I went to the ER yesterday and the found 8mil of HCG in my blood after the urine test came back negative as well. On July 25th I had a watery brown discharge that’s never happened before.

I took 4 pregnancy test at home prior to going and they were all negative. I have a follow up with OB Wednesday to see if my numbers are going up or going down. Praying that they tested super early and that’s why it’s so low.