I now see why you are asking those questions...listen, in a situation like this, it is really tough, because you were about to say your vows and things didn't work. Just be thankful you didn't take the next step or things might even be worse. Listen, I'm not going to sit here and tell you what to do, but I think as EVERYONE has obviously mentioned, with time things do get better.
My suggestion is that you may be on a rebound right now and that's why you miss the physical aspects. That's absolutely normal and you shouldn't beat yourself up for it either. But listen, seeing someone else is not wrong, but don't force it to be a long term, when you're clearly not over your ex get my drift? You have to keep telling yourself you're not going to let those thoughts of her with someone (that you have no idea about) let that bother you. As much as I was tempted to find out how my ex was doing, I kept saying that I was doing fine. Eventually it started to work.
I think that if you are going to contact her, it means that you want to 'work things out' and not to see how or who she's doing. If you are calling just to figure that out, then you're right, things might get worse. Having second thoughts is always normal and I'm sure that she has second thoughts too. You guys loved each other enough to have become engaged. Contact her when you're ready and out of the rebound, because if you give her the idea you want to work things out and she's willing, you will regret later that you only went back for physical reasons. Keep us posted on your decision.
Cdoc
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