The right side of my lower back is aching bad & it comes down to my uterus , I've had this before when I was 18 weeks , I went to the emergency room & it was a kidney infection .. But now it's kinda the same but not as painful , my mom thinks it's just my ligaments stretching . But I also feel pressure when I pee & it just feels weird . I'm 22 weeks & 5 days now btw.