Could I be pregnant or this hormones coming to normal

Alexis • Mom of a little girl ❤️ Aubree Elizabeth Dellinger was born 9/1/28
I didn't go and get my depo shot last monday. I have been having brown spotting, sore nipples, cramps (lasted 2 days),headaches,more tired, yeast infection,extremely emotional and using the bathroom a lot. I have had unprotected sex on the 12th