Questions…I’m so confused

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My hgc levels on the 29th was 373 at 930a then at 1130a it was 425 (my pcp then my ob)…..I had a follow up ultrasound appointment on the 29th where he said everything was closed and I could try again so I just wanted to test today cause I had some light pink discharge today (still no sex yet) then today it's 452.5 …..my dr said he knows for sure that i don't need a d&c so why are my levels raising?