Yeah Lissy, sounds all OK to me, ligaments stretching, the muscles underneath strengthening up, with or without BH going on. I had that intermittently from 20 weeks onwards. BH would happen if I'd been sitting for a while and then just suddenly stood up. Got a tightening right underneath. Your pelvis will be widening out. Just remember to sit and move like a man and later in the pregnancy, yes, waddle when you walk, a nice wide gait. I read a physiotherapists book about reducing pelvic instability, (many physios don't know all this). Protect the pelvis with a wide stance as this helps avoid pelvic instability that can also cause pain lower down. Lots of relaxin hormone flooding those joints!!