I bought one about a month ago and used it twice since then. Both times, it was a nightmare. I got it in, turned it on, and it didn't feel amazing. In fact, it didn't feel good at all. It just put an annoying pain in my lower back. And to top it off, both sessions yielded two of the weakest orgasms that I've ever had in my life. I think I'm actually using this thing wrong, can someone post or message me complete step-by-step instructions on how to use this?