If you are working towards reinstatement than it couldn't hurt to meet with your elders and express concerns over the attitude of the congregation should you become reinstated. You do not have to "out" yourself that you were browsing through private messages. You can simply state that you have picked up on tidbits of gossip from here or there and are worried you will not be accepted into the congregation once reinstated. Come from a place of asking for their help, and try to see if you can get a couple of the elders to support you. Also, stay proactive about it, and once reinstated, be sure to ask for a sheparding call to follow up on how you are getting along. If there is a problem, they may have to bring it out in local needs or counsel the people still shunning you.
Every congregation is different and it is hard to say what yours is like. It is typical for JWs to take sides on an issue that is none of their business. Although, I can honestly say that I doubt the whole congregation will shun you once you are reinstated. There are several reinstated ones in my congregation that have committed adultery and some have done it more than once. Unless you know their story you would really never know. They aren't treated any differently. Again, all congregations are different, and in the end you may find switching to a new one is really best.
Im sorry you are going through this craziness. I personally don't know if I could or would go back to them if it were me, but, no judgement here. We all have our reasons.
