Newbie needs advice

[lovesgardening]

I live in Illinois. On 5/17/08 was injured at work. Ended up going thru surgery in August on knee. While off, I received w/c and they are paying medical bills. Was suppose to return to work on 9/15/08. On 9/14/08 received an email from boss stating "my job was no longer available". Still having major problems with knee, major pain, still limping, on pain meds and icing knee down daily. I told dr. I didn't think I would be able to return yet due to the pain and swelling in affected area and knowing my job is 75% standing and walking. I have never filed a w/c claim before. Been with co. 10 1/2 yrs. I was told that since I had surgery I would be getting some kind of settlement? Does anyone kno anything about this? And also, Did my employer have the legal right to basically terminate me while still under w/c? Should I seek legal counsel on this matter? Any advice would be greatly appreciated.
P.S. Was called yesterday by an employee and they've hired someone to work.