Geesh... sorry I missed throwing you some hugs and unsolicited advice :|
What a story!
Few things... there's a mind body link now - scientifically proven - between asthma and anxiety. So even if you aren't aware of a trigger in the present )C-PTSD) it can still cause a flashback and an asthma attack.
Sure you'll do some research and find out more on your own but feel to ask any questions at all and I can share what I've found or just post links for you.
Also... that sounds like a nightmare, high stress situation. Glad you're safe now (I hope).