Hello Liza. Well, I don't know if my advice will help (I haven't been quite through your experience) but I'm an Egyptian Muslim...
If your Fiance is cultured and well-educated, chances are you won't have to make any compromises about your own beliefs despite your own will -he won't force you or anything... May be the only compromises you will probably go through are at times of occassions (e.g. Ramadan, two feasts, etc) -in terms of joining the rituals of dinner and celebration. But in all cases, all Muslims will want their children to be also Muslim, so I think you have to work this issue out.
That's about him being Muslim.
About being Egyptian, my advice is this: Arab culture allows men to be a bit more demanding without any bad conscience, and expects women to meet such behaviour without any grudge or hard feelings. So my point is that you have to be explicit about your worries and your expectations for the future: place of residue, whether you want to keep your job, rights and obligations of the household, etc...
Anything else, please don't hesitate to write
)
Cheers everyone!
Sawsan