Way to Go!!! I was 248 and now I am 220 ... I understand ( I am also 5'7.5" ). I make monthly weight goals on here which is bite sized chunk I can manage without any stress.
I walk for 35 min first thing Every morning except for last Saturday when it was pouring rain with 90 mph winds...I let myself off that one! Lol I do something called Oxycise by Jill Johnson which is awesome cardio...and I do it laying on my bed!!! My fat is just melting off me with all the deep diaphragmatic breathing and isotonic/isometric bodywork. Oxycise is online, there is a great community and lots to read about why oxygen burns fat...you just don't have to jump up and down to do it!
Hang in there..keep doing what you are doing it obviously works for you.