lower back and abdominal pain

Thankyou so much for your time. I am a 37yr.f/110lbs.  I have quite a few health issues and take multiple meds. including coumadin and antiarrythmics.  I have a pacemaker.  I also have been treated recently with zyvox for sinus osteomyletis, previously with mult. other antibiotics.  I have severe osteoporosis and recently started forteo injections.
Here is my situation.  About a week ago, I was on a hayride.  There were a couple of very big jolts, where the driver in a pick-up truck drove very fast over some large pot-holes. It was jarring.  Later that night when I lay down for bed I noticed intense back pain.  The pain continued the next few days and quickly moved around my abdominal and pelvic area. It is severe cramping pain.  When I began to have diarrhea, it was thought to be antibiotic related, and I was put on flagyl.  I am taking hydrocodone for pain.  Sat. morning I woke up feeling the continued awful pain and began massaging my lower back.  I noticed extreme pain when touching some of the vertabrae. The pain caused the cramping abdominal pain to increase.  I am now having trouble with bowel function.  I can't seem to push.  
My questions:
Does this sound like a possible fracture, and how is it diagnosed?
Can a fracture cause abdominal cramping/pain or bowel function problems?
Is it okay to wait a couple more days before I see my doc.?
How is this generally treated, if it is a fracture?
Thanks so so much!  

[CCF-Neuro-M.D.-PW]

As you have osteoporosis you have an  increased risk to fracture bones such as vertebrae and pelvic bones - you should have this evaluated with plain xrays as soon as possible, you should not wait. Extreme pain on touching the vertebra is suggestive of a fracture.

Vertebral fractures are usually treated conservatively with painkillers, and continued treatment for osteoporosis. In some cases injection/insertion of a kind of cement can support the fractures vertbral bones - a back surgeon can asses the need for this if a fracture is detected

Pain from a vertebral fracture can cause altered bowel function usually constipation, you may need to take stool softeners (which should be presribed by your physician only).