Why am I unable to sleep during pregnancy?

I cannot sleep and I feel dead tired all day. This has been going on for a while now. I wonder if it has something to do with my spouse being incarcerated, Im not sure. I just want to sleep but Im 37 weeks pregnant and I cant get comfortable, my back, legs, neck, and feet hurt really bad. Please Im so tired I cant think straight Ive been up for 48 hours and my baby keeps kicking me and Im having braxton hicks contractions. Its 2am here any suggestions?????