Sounds like spd/ sciatic I suffer with both and its sounds the same not much you can do about it apart from go on YouTube and try light stretches hasent worked for me and neither has paracetamol or hot baths(not 2 hot) but may work for others. If its causing you to much pain and has you up through the night speak with your gp/midwife or a consultant if your seeing one the prescribed me codeine I only take when I really cant take the pain or walk, hope this helps and you feel better soon. But you more than likely have this till.little ones arrived xx

Definitely sounds like sciatica and its a nightmare!! Like @ezchaz light stretches didn't work for me but give it a try some stuff on YouTube. The pain in my bum cheek never went away and the minute I had him it was like it instantly went n came every now and again. Baby might be sitting on a nerve. Hope it works for you. Xx

Sounds like spd and the deep bum cheek pain sounds like sciatica xx