I totally understand how you feel. At first the reviews for the resort we want, Laguna Azul, were all mostly positives, with only a few things going wrong. That was to be expected though, as it is a very new resort. But then when November came there were a LOT of bad reviews. There even were bad reviews for our second choice, the Iberostar Varadero. So like you we started to panic, wondered if we are making the right choice, etc. But then we calmed down and reminded ourselves that for every person who writes a review, there are hundreds who went and didn't write one. Like others have said above, people will mostly write if something went really wrong or really good, but not the ones in between. Even us, we've both been to AIs before (separately), had a good experience, and didn't write about it.
I know it's hard to relax, as even to this day I still sometimes question our choice. But really, relax. It is YOUR day, and if you love the place than that is all that counts. The people who are easy going will love your wedding week no matter what, and the whiner will find something to complain about no matter what. Don't sweat about them, and focus on the ones who will enjoy it just as much as you. :-)