This is the kind I have:
So I think that it's likely that the riser pad is causing the problem. So once she's feeling better I'm going to try riding without the pad and check her back again. If it's still sore I guess the saddle is the next thing to look at. I'm getting her a new one anyway as soon as I get my money saved up. Or maybe I can get my mom to pay for the difference as a Christmas present.
But anyway, if I still happen to need a riser pad with my new saddle should I try a lollipop pad? Or should I see if I can find a saddler to build up the back of my saddle. That might be a little hard because I don't think there are any professional saddlers near me.
What do you guys think?