lump in throat that travels up

Lately I've been having either panic attacks or some weird thing happening to my throat.  I should mention it only happens after I smoke (big bong hits but please don't just tell me don't smoke weed i already understand that it would stop this from happening but i still would like to know what it is).

It starts right where your wishbone is, on what feels like the muscle.  First it just feels like a little lump, but then it tingles, then feels like a bubble and slowly moves up the side of my neck.  Then it makes half of either my tongue or face tingly, and after a while the bubble makes its way up into what feels like my brain and my whole head tingles.  I start panicking and feel like I'm dying so I've been brushing it off as panic attacks, but as it was happening to me last night I realized "I don't know for SURE that it's panic attacks...what if it IS something real?"  Because I was almost positive I could feel this travelling "bubble" when I put my fingers to my neck.

I should also note that I have very slight asthma.  I've never had an asthma attack or anything; I just might wheeze a little after smoking.

So has anyone ever heard of anything like this, or is it safe to assume it's panic attacks?  Thank you in advance.

[BethanySublime]

oh and the lump usually stays in the wishbone area for a few minutes before it starts travelling, but during that time it changes from a slight lump to tingly to feeling like the muscle wall turns very hard & spreads and then into the "bubble" feeling at which point it starts to travel.