hello I'm 18 & I've noticed that my bladders been wierd . I would have to urinate alot more then usual but half the time when I pee it'll be only a tiny amount also ill still feel like after I just finished peeing that I'm suppose to have more coming out like that urge but nothing comes out it's wierd . But what has me really concerned is since the other night I had unbearable pains in my lower back & my stomache would ache it would make me feel nautious & would have me just wanna lay down & not do anything at all . A heating pad helps the pain & 2 ibprofens help too but it only temporarily makes the pain stop if I'm not takin pain medecine or using a heating pad then the pain is still there. Also I usually eat alot but since the pain in my lower back & the stomache pains came I've been feeling a big loss of appetite . I would feel like if I were to eat ill throw up or something so I just don't eat that much to prevent myself from throwing up . ive also thought it can be symptoms of me about to get my menstrual but never had i ever had these type of lower back pains before . & then my fiancé suggested maybe I need to use the bathroom (number 2) but I've used the bathroom & all but it didnt make the pains go away . im sexually active with my fiance but i dont know anything about pregnancy so i dont wanna assume & then i end up not being pregnant because I've done research all I see is people saying they think they're pregnant , or people telling others that it can be something to do with your bladder or gall , I've seen people say something about cancer , diseases . & yeah researching only made me even more confused is there anybody that has a really good idea of what can be wrong with me ???( im gonna go to the doctors soon but i would really APPRECIATE the help ,facts or opinions ,& any suggestions .)