I think i have a kidney infection D: ?

Im diabetic type one, it really burns when i wee and i keep needing to go, aswell as that i have a bad ache in my back which is worse when i lie down :( also it hurts when i press and im getting stabbing pains. I've had this before and it feels alot like a kidney infection (i have had a few in the past). I tell my mum but she doesn't believe me :( what if i keep kidney damage or something D: apart from the fact i dont feel very well... :'( I think im going to the doctors today...will they be able to tell?