What Causes Frequent Urination, Nausea, Fatigue, Back Pain And Spotting?

my symptoms started very similar to early pregnancy symptoms. Frequent urination, nausea, and fatigue. Feeling not like myself, tired all the time, want to lay day. When I do go pee it comes out fast and I pee a lot. This week, i started spotting with some mucus, now its more spotting just small amount of blood, like a drop. My period should start any day now, but it does not feel like normal period cramps, unusual cramps that hurt, my back hurts closer to my kidneys and I pee a lot. I have a history of bladder infections and UTI s and kidney stones, but this does not feel like that. I m still peeing a lot with powerful stream.