Awww Romp, its a tough one I know. I don't know how old you are or your situation, but I am OLD and just launching back into psychotherapy etc as old coping mechanisms such as SI have raised their head after many years' break.
I know that having therapy does stir everything up, but if it gives you some longterm benefit and relief then just maybe its worth it?
I'm giving it a go, and as I know I'll be triggered when I do see my therapist I am putting in place some support around those times.
Your call at the end of the day, but I guess if you're still having those thoughts and having to work at suppressing them then you should give it a shot, and if it really makes things worse then you can stop it.
Just make sure your decision is based on what's good for you rather than "do I deserve it with so many others waiting" cos that would be the wrong reason OK? You deserve care just as much as anyone in the planet. If not more given you've had to wait 3 months

/
Take care,
JK