What's going on?

I've been fatigued more than usual, moody, achy, stomach aches, and hot flashes. This has been for over two weeks. Nausea started a week ago in morning and afternoon, sore boobs in afternoon and two days since I've started peeing every 2 hours or less. I feel miserable. We aren't ttc, but I'm off birth control 4+ month and when it happens it happens. My last AF was July 15th and I'm soon going to make a doctors appointment. I took tests - negative.