Sounds like your concerns are primarily monetary ones.

The feeling is like: fuck, i've just put down like 8 buy-ins in old stakes here.
But you will have only lost 3 BIs at new stakes!

You will get used to the money difference pretty quickly I think, just, like others have said: PLAY LESS TABLES.

I know dranger bought in for $2.50/$3 when he first moved up and his operation graphic tells me he's now on his way to 10nl, so, that worked for him. I don't like the idea of buying in short just because a) you're restricting yourself to playing 2 streets of poker a little bit and b) you might run good!