i suffer from reccurant uti s and have been on antibiotics (amaxacilin) since last monday, so a week, 1 3 times a day. i finished the course last night and was begining to feel better, but this morning, it has got worse. i am suffering more now than i was when i first went to the gp on monday last week. it feels like i am peeing glass and constantly feels like i need to go, but i dont. my lower back is begining to hurt too? please help