About A Year Ago I Had Sever Pain In My

About a year ago I had sever pain in my lower back and pelvic area and all through my legs and I had the urge to push down there it felt like I was in labour but I wasn't I didn't know what to do with myself whether to walk around or sit or stand I was I the fetal position I went to the hospital but they couldn't figure it out it has come and gone since then but now it's back and it hasn't gone away for about two weeks but the pain isn't as bad as last time and when I go to the washroom and When i go to push even a little my legs hurt in a really weird way I can't describe what do you think this could b