I seem to have developed a second embouchure as a result of mouthpiece buzzing..
It`s much tighter and my lips pinch in almost at the centre-it`s quite easy to get high notes without using much pressure but cant get low ones.
Any suggestions?

wow thats something i gotta see

dont use it....use the one were u can get a comftarble upper octave as well as lower....i had the same thing but the seccond my teacher saw me he stopped me and made sure i went back to the old embuchure...

but the thing is im tempted to use it because with my normal embouchure, i struggle a bit in the upper register and use quite a bit of mp pressure and as a result kill my lips..
this "second" embouchure i think i roll my lips into a pinch(i think its something or other like that..) and that takes me way up to the high registers without any problem but it sortof puts a "Block" to any notes below the g ontop of the staff.

Oh and one more thing.. I`m going on vacation and wont be able to take my trumpet with me. It`s for 6weeks. I was thinking of taking the mouthpiece though..

Vacation is a terrible thing in some respects. The trumpet is not a large instrument, but would be classed as inconvenient when it comes to travelling. I say take your mouthpiece with you is the second best option to taking your trumpet(which in your case doesnt seem like an option)

Happy Buzzing!
Booooooth