I'm so sorry. Well done for getting out.
I think the best thing you can do at this stage is just to look after yourself very tenderly, like you would look after someone you loved who was ill or had been through a very difficult experience. Lots of rest, sleep, nourishing food, seeing people who make you feel good, doing whatever hobbies and activities you find relaxing and restful.
If you've been gaslighted for so long you'll have learned not to trust your body or mind to know what's good for it, so just slowing down and listening to them is something that won't come naturally but if you can teach yourself to be compassionate towards yourself it'll be a big step in counteracting the damage that was done to you.
It sounds like as well you might be a bit still in the mindset of there being something wrong with you that needs fixing, which is what gaslighting does. You need to give yourself space and time to heal, rather than trying to fix the damage in any one strategy, if that makes any sense.
Take care, look after yourself, sounds like you're being incredibly brave, and keep talking on here if it helps