possible sacroiliac problem

hi! I am glad i found you! I really don't have anywhere else to go besides the internet as my husband and i are both laid off and no longer have health insurance. 7 weeks ago, i came down with an acute case of bronchitis while on vacation. we were in such a remote place and no way of treating it. My cough was horrendous to say the least. One night, i got up to go to the bathroom and while using the bathroom, began coughing. something moved or more likely jolted in my lower back. i knew i had done something but made it back up the stairs to bed. 2 hours later, i awoke with the worst back pain i have ever experienced. I could hardly get off of the bed...i was on all fours crawling to the end of the bed and somehow wiggled off of the end of it. the pain was severe and i think it was spasms of some kind....they wrapped around my hip bones to my front and down the front of my legs to the knees. i could actually watch the muscle on my hip spasm. coughing was excruciating, and in order to not further this injury, i would have to put my hand down on the bottom of my back and push...when i got home, the muscle spasms continued every morning. i would get up and would not even be able to use the bathroom until i had sat on a heating pad for sometime. if i sat in a hot tub, my husband would have to turn the water on and off because in my state i could not lean forward. Now we are 7 weeks later, and the last time i had the severe spasms was about a week to a week and a half ago. i still wake up in alot of pain and simple tasks are monumental. walking is horribly painful. so is standing. i find the most comfortable position is in bed or in my computer chair with a small pillow supporting my back. i researched my pain online and was grateful when i discovered that my pain seemed to match sacroiliac pain. i also have a dessicated disc between L4 and L5....i bought a sacroiliac belt, but i wonder what i can do to improve. will walking or small hikes help? it is painful but should i be working through the pain or resting when i am in pain? any ideas?