I think you should take a good long break and give your poor brain some normal living before you decide whether to try it.
And don't think of it as doing chastity "again." It should be a completely new and different experience, entered consensually and under terms that serve your needs and desires and under a keyholder who always prioritizes your well-being over some demented ideal of security.
If you do try it, I think you should leave the door open for stopping or taking a break without any negative consequences, such as with a safeword, and you should only continue it long term if it is improving your happiness. It should serve you, not the other way around.
I would also suggest that you take a more relaxed approach to things like travel, doctors appointments, or swimming. Unless you have a diaper fetish (and no judgement towards those who do), just fly without the belt and use the bathroom if you need to.
And if you do try it out, and it gives you PTSD flashbacks and makes you miserable, give it up and don't look back.