Late period

My period is currently almost 3 weeks late. I haven't had a period this late in 2 years, but I've gained about 35lbs since Covid hit and I'm thinking it could be that. I've taken 4 pregnancy tests and all have been negative. I've only had mild cramping and nausea. We also just moved to a new state and I haven't gotten set up with a dr yet.

Yall have any advice?