Thoughts?

I had a miscarriage on 12/12/18 at 6.5 weeks pregnant. I’ve been getting my blood drawn (haven’t in the last 1.5weeks because of the holidays) and I’ve been testing with internet cheapies to check my hcg levels and make sure my positives are getting lighter. For the past week my tests have been getting so light that I can almost mistake it for a negative but I know there’s a very very faint line there. Today I tested and my line is darker.

I’ve also been testing with opks because I heard you can ovulate before having a period after a miscarriage. I also was almost certain that I ovulated on Christmas but I wasn’t temping so I can’t say for sure.

Top is yesterday’s test and bottom is just now.

Could it just be a fluke or could I possibly be pregnant again already? I feel like it’s kind of fast...