Hi, I Have Had Pain In My Lower Left Back

Hi,

I have had pain in my lower left back more down towards flank area for the last 2 years. It's not severe and I can go without noticing it for days/weeks and then I will stand in a certain way or lie in a certain way and its painful, like a sharp pain. Along with that I have frequent urination. I need to pee all the time. E.g I drink a coffee (which I know is a diuretic) but I will desperately need to pee maybe 3 times in the 2 hours after drinking it. I would say I pee 20 times a day, maybe more. I feel irritation in my bladder when I need to pee and if I press on my bladder with my hand it feels irritated. I also have an issue (embarassingly) with bed wetting. I do it when I drink alcohol but I only need to have 2 to 3 drinks and be perfectly sober going to bed when it happens. I have always blamed this issue on alcohol but last night I went to bed after a quiet night in (I only drank water all day) and I wet the bed. It has really frightened and upset me. Is there any illness that covers all these symptoms? They have not improved and in fact have gotten worse in the last 2 years. Thanks