On 12/29 i had a positive test. Days later i had a regular period. No blood work was done but my

Ob nurse told me it was a false positive. Yesterday 2/2 my period was due, I’ve been feeling a little off so i took a test and it was positive. I had blood work done and my HCG level was at 35. She said it was either a miscarriage (I’m not bleeding) or the start of a new pregnancy. What is going on?!? I go tomorrow for more blood work.