Both my partners are living together hours away from me and I don’t have any way of contacting either of them and recently I’ve been having a lot of relationship insecurities. Usually I talk them out with my partners but I can’t do that and I don’t know when I’ll be able to speak to them again. I don’t know what to do.

It sounds like your inability to contact them is the core issue here - my advice is to consider that situation an emergency and do what you need to do to resolve it. Is it a person in your life or their lives who is being controlling and restricting contact? Is it an issue of access to technology? Is it funding? Make a plan to get some kind of contact in place, whether it’s sending emails from a library or writing letters or buying a burner phone. Start a GoFundMe, enlist a friend to help - do what you have to do.

If you really can’t talk to your partners, you’ll have to find other ways to work on those insecurities. Try journaling about them, joining a polyamorous chatroom or forum, talking to a therapist, spending time with friends you trust, or working on a self-help workbook focused on whatever you’re specifically struggling with.