Positive pregnancy tests 5 weeks after miscarriage

Last month, my husband and I lost our baby girl at 11w3d on Mother’s Day (5/8). It took exactly 3 weeks to stop bleeding (no pills or D&C- I passed the baby and placenta naturally at home and the transvaginal ultrasound a week after my MC was completely negative for and RPOC) and at this time my hCG dropped from 150,000 to 500 in a matter of 6 days after my MC. After that I’ve gotten 2 negative pregnancy tests on 5/27 and 6/3.

Fast forward to last week and I started feeling nauseous and tired with light brown spotting so I tested and I got a positive pregnancy test on 6/8. They have consistently been positive ever since then and I’ve been testing every day at different times with different tests because of the varying hCG sensitivity with different brands.

Could this be leftover hormone 5 weeks after my miscarriage? Or could this be a new pregnancy? I’m really confused given I got 2 completely negative tests around 2 weeks ago and am now testing positive every day. All input and advice is appreciated!