Buy some sweats, put them in a plastic bag. Ditch the luggage and put everything in a hot dryer for at least 30 minutes, get a shower if you can, and change into the new clothes.

If you can manage it, getting the new clothes and making that switch before the plane ride will be appreciated by everyone on your flight. Bagging everything inside the luggage might help too, but unless you just leave everything in Mexico you're going to be transporting them somehow.

Good luck. Bed bugs are a terrible thing to get rid of once they get in a house.