Ok, I don't really know how to ask what I need to ask, so heres some background info:

I'm 21, and have never been in a serious relationship. I'm still a virgin, but have fooled around with guys and have given and recieved oral, but have never reached orgasm. While that didn't really bother me before, I've recently started a long distance relationship with a guy I know and care about, and in 2 weeks he's coming to see me, and its the first time that we'll be an actual couple while together, so a whole new world is opening up for us....

He's 26 and much more experienced than me, and while I'm sure he'll be able to please me just fine, I want to make sure that I'm not the one causing problems if things aren't working. One thing I've been told, and read about on here alot, is that a woman needs to know herself so she can help the guy to help her. With that in mind I bought my first vibrator last night.

Wow. Thats all I gotta say.

While it's definitely doing a good job at helping me find what I like, I haven't come yet. But I think its because I'm not really sure what to expect or anything like that. Heres what I've experienced...
 When I hit a certain spot, it feels really good, but then pretty much everything from my butt to my toes tighten up and I can't move my legs. Is that supposed to happen? When that happens, I have to back off, and wait a minute and go back. I mean, it feels good, but is this normal? Am I gonna have to push him away when he's working down there?

I don't know what to think. I just need advice on how to ease myself into this. He said that he wants to make is special and please me to the fullest...I just have to make sure that I know what I like so I can tell him   He's so wonderful and I know that it's gonna be great, I just want to make sure that I'm prepped for it (Im fine mentally, its the physical part!)

Have any of you guys had to help a girlfriend with anything like this? Or girls, have you ever been where I'm at?