Help please,foot sprain??? what is the longest it would take a metatarsal sprain and joint injury to heal?

I was in a car accident 5 months ago.....my foot was injured pretty bad swelled up and bruised for two weeks i couldnt put weight on it all......the first doc told me to just rest it a few days.....well a month later it still wasnt better. i went to a second doctor who exrayed didnt tell me much and had me wear a walking boot for 5 weeks......i stopped wearing the boot and tried a good pair of stiff soled shoes.......i been havinguionstant pain so i went to a third doctor.......he said a have a bunion caused by the accident......he has given me two cortisone shots.....the shots hurt pretty bad and dont seem to help much......so i have been diagnosed with hallux rigidus,an injury caused bunion and metatarsal sprain.....im am getting worried cause its been five months and ive had constant pain every day with or with shoes......aleve and pills barely help.......i can kinda get around with a cane but if anyone can give me any advice or share their experience with bunions or foot injury i would really appreciate.....i am at my wits ends......i cant work or really get around to well......and the pain is getting hard to deal with.........can a sprain take this long to heal? is hallux rigidus permanent? do bunions hurts constantly? my bunion is not large and my toe is not bent under my other toe..........also i get a horrible burning in my foot....mostly on the bottom........im supposed to get another cortisone shot next week......the doc said it will calm down the inflamation........i dont want foot surgery.....is there any other option?