How to stop myself going insane

I haven’t slept more than 3-4hours at night for the last 3 weeks (I’m almost 37 weeks pregnant) I’ve got horrible back pain, hip pain, pelvic pain, restless legs. I’m taking magnesium supplements, got magnesium cream, having baths every night before bed, reading in bed instead of using my phone, listening to white noise / sleep casts, herbal sleep teas, using bath salts. I have tried everything possible. I can feel myself about to go completely insane with the pain and lack of sleep. Any tips😭😭😭