I haven't had it before but I'm really struggling to breathe comfortably I have such a heavy feeling on my chest. I've had Braxton-Hicks since 26 weeks (nothing major) last couple of days they've really amped up in frequency and menstrual like backache the last couple of days had a growth scan today and saw consultant all is ok and on track baby been head down since 28 weeks but just wondering if anyone else has had this and if it passed how long did it take?