Sending you positive thoughts!!! When you do your labs, ask if you're having a full thyroid panel as well (vs the basic three levels) It's quite common that our thyroid gets thrown out of whack due to pregnancy/postpartum and its overlooked as typical mom fatigue.
I went through this it’s scary do you have unusual bleeding I had all the symptoms bur thanks to god mine was a polyp do you have bleeding between ur cycles at all
I really hope you get some good news. I had a similar experience, and tenderness at my breasts, what felt like masses and I was scared. I did all the tests and it came back that I have a hormone imbalance due to pregnancy/ BF etc! Maybe explore this too? Could explain your symptoms? Sending you lots of positive thoughts!