I can really relate to Post by "MOLLYFIN' - Depending on the strength of past panic attacks - (before I had medication).
I would start to feel a choking sensation in my throat, especially at restaurants and public places, and sometimes when I would be working out at the gym. I never had them before, but started to have them when I was 19 -20 years old.
The sensation would start to turn into a dread and feeling of suffocation, that would in turn spiral into hyperventilating, where I would need to breath into a paper bag to help return my breathing back to normal. Some episodes were minor, while others actually sent me to E.R. - I thought I was dying (Sever Panic Attack).
I know there are many techniques w/o medication that help with trying to catch your breath - (but in my case, the use of proper medication removed these frighting and terrorizing episodes). Which makes sense - since many of the Panic Attack Disorders are Biological and not Physiological based).
Hope you feel better,
and make sure to monitor them... If they start to worsen over time, do not hesitate to see a doctor - they can really help.... If they are not that serious, I would look into some wonderful natural mental and breathing techniques to help you manage these episodes.
Keeps us informed on your progress -