You're welcome. Its good that you are so concerned for your pet and you are not willing to just cross your fingers and hope for the best when s/he is clearly in distress.
Blowing bubbles, opening the mouth a lot, popping sounds when breathing... sounds like most descriptions I've read on RI. I've never dealt with RI personally, so I'll leave it to the pros to give you better pointers.
If your snake poops, I suggest saving it in a small jar. The vet may want to do a fecal, and this will save time and a trip.
When transporting your snake to the vet use a pillow case (with a lose single knot) and keep it inside your jacket, with your jacket unzipped just enough to allow air flow but closed enough to trap heat. That will help a lot.
A vet visit sooner rather than later is ideal. Please let us know how things go!