What could be wrong with me??

So for the last year I’ve been back and forth from the doctors having blood tests for iron and b12 due to feeling exhausted all the time, they came back fine and I’m still exhausted now and lacking in energy. But just lately the last month of so I’ve been needing to pee like 3 times an hour, not just little bits either and it feel quite uncomfortable if I try to hold it, I feel cold most of the time, keep getting body aches in different places, mainly my back and I was just wondering if any of these could be connected in some way? Any advice cause I feel like the doctors aren’t taking me seriously but I know my body don’t feel right..