HELP!?!

Okay, so basically I am really tired of working but my doctor will take me off work. I am a probation officer and my job is very stressful and it takes ALOT of energy to do my daily tasks. I am still doing home visits and my job won't take me out of the field until I am 3 weeks from delivery. I'm due January 6, 2017😳. At 24 weeks I started having actual contractions and had to go to the hospital but because of medicine & God of course, they have subsided. However, I am experiencing terrible back pain and I get cramps in my anus (it's like anal spasms or having a Charlie horse right in your butt hole). The stuff is very painful and when I have them which is atleast twice daily for 4 to 5 minutes, it's freezes me and I can't move because of the pain. Now, I am at 31 weeks and I am experiencing the normal Braxton hicks but they are LITERALLY breath taking and it's Braxton hicks added to all the other pains I've been taking. I've requested bed rest after explaining all of this to my doctor and she just won't do it. All the doctors do is prescribe more and more medicine. If I were to CONTINUOUSLY take all of the medicine they've given me since I was 24 weeks and had those contractions (they were 8 minutes apart), I would be on 9 different medications. They haven't even diagnosed the issues, they simply guess and with each doctors visit, I see a new doctor because that is the way the practice works and each doctor says something else. I need the doctors note to keep my pay and this is the only reason I haven't went out for maternity leave early. Can someone please educated help?!