What have you tried

I am on venlafaxine (Efexor is one of the more common name brands). It's usually used to treat depression and anxiety, but it suppresses REM sleep as well. I take that and usually Adderall for daytime sleepiness, but I'm currently breastfeeding so can't take my Adderall at the moment. I tried modaphinil, but it didn't work for me at all and I was also having heart palpitations with it.