Low hcg success stories or insight?

Has anyone ever had super low hcg. Like under a 3 at 5 weeks. My hpt are faint, my blood tests are neg. Second time this has happened. But, 1st ended in miscarriage and levels never rose. Now I’m 8-9 days late with negative and faint positives some days. Experiencing nausea as of yesterday. I would have conceived on 1/11/22 and it’s almost 1/31/22. What’s going on? He’s my faints (and I only get positives at night). These are from 1/28 and now I’m just getting a faint here and there. All these were the same urine sample and all had color and appeared in the time frame. CB has a slight evap as I took it first. But, had a faint positive.