Sciatica, pelvic pain and restless legs 😖?!

Every night I can't get to sleep because I have what I'm assuming is restless legs. I literally can't keep them still! If it isn't restless legs that's keeping me up, it's sciatica down both legs and lower back pain, and tonight, my pelvis/hips have started to ache! I've been resting and I've tried stretching my legs out but they just feel swollen and heavy. I've been prescribed sleep medication but my doc only gave me 10 with no repeats and I'm starting to worry as I've only got 2 left and if I'm not allowed to get anymore I have NO idea how I'm going to be able to sleep at night. I'm 32 weeks with my first bub and he has definitely grown his quickest the past couple of weeks because man I am in pain! 8 weeks just seems way to far away I have no idea how people who are bigger than me deal with this. Has anyone got any tips or advice? I've tried self massage, stretching, Panadol, rest, everything! I don't know how much longer I can put up with no sleep and aching body. I already suffer from very severe scoliosis so this is just making it 100 times more uncomfortable 😪