You're welcome to talk about it as much as you need to on this forum, and people will understand. Many of us have been in a similar boat as yours, and we just about all have some experience with polyamory.
Communication is arguably the most important element to a poly relationship. It's wonderful that you guys are getting back together and giving it another try. Take advantage of the opportunity to sit down all three of you, and talk about what the issues are, and how you can work together as a team to solve them. You should consider having weekly or monthly sit-downs, at least for awhile until things get calmer.
We're here to help in any way we can.
Love means never having to say, "Put down that meat cleaver!"