Hi mightsurvive.

there are plenty of ways to deal with flashbacks, if you search the forums for flashbacks I know you will find many different ways.

One method is to put your hand into ice, I have a bag of ice, already open, I just go to the freezer and dunk my hand in, doesn't take long to come out of it.

second method, is to feel a fabric, or something else similar, to remind you that you are not actually in the trauma again, but are somewhere safe.

another method is to try and fast forward,, rewind and pause the flashback, to give yourself a sense of control, kind of like watching a VHS tape. try this with a good memory first to practice.

Instead of slapping yourself maybe you could try yelling stop, very loudly.

And the last one is to not fight the flashback, the more you fight it, the stronger and more phobic of them you get. If you can't do anything of the other things, just let the flashback happen, remember it is only a flashback and this is not the real trauma, if you can try and do some deep breathing, and when it passes remind yourself again it was only a flashback.

Believe me I know these are hard to do a first but practice helps

good luck, and hang in there