fell in a chair

I fell at a Menards store June 21 2012 I sat down to try out a chair that my sister in law called me over to and it went backwards the store manager came over and called ambulance I went to er they xray my lower back and put me off work for two days and told me to follow up with my regular doctor. When I got home there was severe bruising going along my spine took pictures. 2 days later I went to regular doctor and she did a dray along my spine and found to be deep tissue bruising I followed up with her 4 times and then she recommended physical therapy I went to that till Aug 21. When they released me. I still have muscle tightness to this day. Their insurance company has paid all medical bills except to my health insurance provider and reimbursed co pays and is offering me a settlement for lost wages and pain and suffering but I don't feel as if it is enough 2100 dollars which most of that is wages. I live in Iowa they say they wont budge on amount. My question is do I have a case to get a lawyer. I don't want to get rich off this but I believe I'm I titled to more than 800 for pain and suffering. May I also add I had to return to work 2 weeks later because I would of lost my job otherwise. My husband and I own rental property and I could not assist him with it due to injury.