anxiety attacks are par for the course with kiddos like ours. and add into that a divorce, geeeesh! it is no wonder! Lexapro is only going to try and keep you stable, but if you are slammed with bigs ups and downs, it can only do so much. You have been through hades and back this year, maybe going to get a temp anti anxiety medication would help.
Just try and be gentle to yourself. At this point, where you are at, the eating thing may be a hard one to overcome. Maybe just try a walk everyday as a start.
How is it going with getting outta mom and dads? I bet once you have a place of your own, you will feel better.
And NO, is the firm answer I tell all docs who want to try my teenager on any medications I know will bode badly for him. You are his mom, you know! Stand firm with them, just like you have your soon 2bX.
Hang in there..........it will get better!