Post miscarriage body issues

I had a miscarriage on December 25th at 5 weeks. It has been almost a month now.. We had unprotected sex a few times, I had EWCM a couple of days and I had very light spotting mixed with CM for 3 days from the 12th of Jan to the 15th. I was supposed to have my period now but no symptoms that is coming. I was so sure I was pregnant again. Took a test this morning and BFN. I'm so sad and confused. Don't know what's going on with my body. I feel so depressed and tired. Anyone had problems trying to figure it out your body after a miscarriage? Just need some help 😔