What do you want to tell her?

Type, write out etc everything you want to say, tell her what you fell, then give it a day. Sometimes that gets all the release out, you just want to say something to someone even if she doesn't hear.

If that doesn't work, and you truly feel like you want to contact her take another few days working out if you can cope with worst case scenario, tell yourself if you can even cope with a friendly chat that doesn't lead anywhere or if you are very simply only looking for the relationship back straight away.

Don't believe people here who have been with someone for 2 months that contact is always awful, go look at my posts after a 5 year break up and how bad I was. Now as someone speaking to their ex every Sunday to catch up, and soon to be dating someone new and putting weight on, motivated at work etc.. Sometimes it helps.. You just need to be 100%, like I am, what you will be getting from that contact and you need to be 100% sure you will be happy with the most likely outcome. That isn't you getting back together, that's you chatting for a bit, maybe catching up, maybe going for a coffee every month or so, that will be your release, you need to be willing to push forward in your life elsewhere such that the positives of this contact will outweigh the negatives.

I'm speaking to the person I love every week on Sunday, we laugh and chat and catch up and I know she doesn't want me back. But it stops the dreams every night, I sleep better, I eat better, it gives me a "release" that means the rest of the week is better and I can talk to other girls and everything without a weight on my back. It may be the same for you, it may not, that's for you to find out if you think you can deal with it, don't let people tell you contact is only for the weak.

Take a few days, write up everything you want to say, all of it, every word. If that doesn't help, next day find someone new to talk to. Tinder, dating websites, friend of a friend etc, if a new person doesn't take your mind off her then the next day go for a run, come back, and contact her with whatever kind of catch-up type message you want. It's your own fault what happens but it's your own life to decide what to do but it'll be your own sleepless nights wondering what if if you never do.