Help ???

Okay so I found out I was pregnant the end of June, but recently bled a lot and had a miscarriage apparently because of it and my hcg level has returned to under 5, and this was probably last week I had the last blood test... but I still have sore breasts and my nipples always tingle and ive been so tired and nauseous and still craving weird things, not to mention the weird stomach pain I’ve been feeling lately. Is there a possibility that I could somehow still be pregnant even though my levels went down to under 5? Could they have went up again within the last few days?