How much does it cost to reverse your tubes from being burned?

I recently had my tubes tied thinking my husband didn't want anymore kids after we have the fourth ..........but now i found out he has another child three months before I did.I have one son,and three daughters,and i always wanted another son.This last babyI was told it was a boy,come to find out at delivery it was a girl.............the process was already being started because I had a C-Section.Boy do I regret ever doing this,but I will save up all I can to have this reversed,please somebody help me find away.