Hi there - yes you do have a dilemma - the first wedding is likely a do. You should have no real problems - except your taste may be off! You may have some sores and difficulty swallowing. Look at the posting on manuka honey - and ask your dr. If you do decide to try it. I found it helped me stay off the peg and continue swallowing - though my nutrition for the last week of treatment and two weeks post treatment was liquiid! I was blessed in that I was only nauseated for a few days after chemo - some people get really sick! I know a man who lived with his head in a bucket the whole time! Not to scare you but that's both ends of the spectrum.
The second wedding is really depends on you. Traveling shouldn't be a real issue - maybe even walking down the aisle. But after that you may just want to hug your child and go back to your room and sleep! I had a first communion 3 days before I ended radiation - and I stayed home. ( my nephew ) I couldn't eat, was drooling more than a great Dane, had little or no energy, my mouth was sore ( though not nearly as bad as it could have been!) and at that point I was content being a vegetable and watching horrible reality shows - I did walk my dog at last once a day though! And despite all this - I was lucky! Believe me - compared to what some people go through I was one of the fortunate ones! Really - it's not an easy path and the effects are cumulative- bottom line, how you feel is a day to day thing. Since it's such a special day and you want to be there - plan on it at this point. Maybe just try to do the walk down the aisle, some photos, then go home! You also have to worry about being around a lot of people post chemo - for a bit because it does a number on your immune system!

I would definitely push for the earlier start date - at nine weeks you may be starting to climb out of that hole - at 8 weeks you'll likely still be stumbing around trying to find the exit - I'm 10 weeks post effects - 12 weeks post treatment and feeling great! My taste is still somewhat sucky, but other than that and some stiffness, and swelling... I'm almost back to "normal". So it does happen it just takes a while.

Re the peg - I had one couldn't use it. The last 3 days of treatment and two weeks following were the worst!! I would take a pain med - wait for it to kick in - rinse with magic mouthwash and then guzzle my ensure! (I only really used the pain meds for a week) it got so I could down it in two gulps... good luck! You'll be fine - a positive outlook has a strong bearing on healing!