Witch hazel is very good, very moisturizing (Thayers, aloe vera). I was surprised when I tried it.
But this is not what you need right now. Your skin needs something that works well for calming down and soothing.
You could try using some natural Calendula cream. It is used extensively in homeopathy.
This is very good for the skin and will definitely assist, without putting you in risk from any possible (even if they are minor) side effects.
I fully agree with antdad and fozz on that taking a step back and leaving your skin to relax a bit is best, along with careful technique from now on during shaving.
What I could not understand though is what they meant by saying that you need "...a good aftershave..." - what would that be? for sure not containing alcohol, but after that what? Speick, perhaps? (because of the natural plant extract?) Would be good to have an example, guys.