Progression?

I had a miscarriage in October, and a chemical December 6. They said I was ok to keep trying since the chemical was so early. HCG levels went back to zero.

I found out at the hospital on Sunday (December 22) that I’m pregnant again. Hcg levels were 299. Wasn’t expecting it for sure, it seemed to early to find out.

Came home and took a test, because I honestly didn’t believe them. It came back blazing positive-

Then went back for a recheck Tuesday. Hcg levels were 294. They said not to worry, that it may just be too early.

Took a test today (December 27) to see if there was a progression. Test looks slightly lighter. Should I start preparing for another miscarriage?