Old fluctuating hcg or new pregnancy ? Delete if not allowed I just need some help

I had a missed miscarriage in May and had a D&C 5 weeks ago. I’ve been testing here and there to make sure my levels are going down. I took the top test two or three days ago and the bottom ones today because I started to feel bloated and my back started to ache exactly how it did when I was pregnant. My question is , could this be a new pregnancy since I watched my levels go down and now they are going back up ? Or can old hcg fluctuate?

Two or three days ago

Today

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