I'm having similar success started Lexapro and my mood is awesome. It took about 6 weeks to get the sleepy/nausea s/e under control. Then I stopped Lyrica and that was what caused me to eat continually. I blamed the steroids, which I'm sure didn't help. But after reading here in one of the forums about the weight gain w/Lyrica, I quit and am so happy. My pain is no better or worse without it. I'm still at 190, but down 8lb in 6weeks.
Much luck, hope you find something to help, froglady.