I have been having the same problem! I have been waking up to change shirts from sweating (sorry I know this is sort of gross) some nights I change shirts twice...I never really had sweats like this in my life and I have especially NEVER EVER had this chemical smell that you are describing. I have the same issue and I just found your post when I went on-line to do some research. Did you ever figure out what it was? I am on 2 medications also but it does not happen every night, although lately it has been more often than not. If you have found out any further information please let me know. I am desperate to figure out what it is. My BF has noticed it as well and I just cant figure it out.