Chemical pregnancy

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This is my fourth mc, at least I’m thinking it is because I think I started my period. I am bleeding, cramping and have passed some clots. My hcg was 25 on Friday at 5 weeks and I just had my blood drawn yesterday to check my levels again, but I won’t hear anything back until Monday. Has anyone had their period and still went on to be pregnant? Hoping for a miracle but knowing it probably won’t happen. Any and all advice is welcome. I’m so heart broken and don’t even know where to start. Is it normal to have pregnancy tests that fluctuate between positive and negative? The last test I took today and it’s completely negative not even a vvfl, is it possible that I’ve already miscarried? 😭😭😭