...bumpers hanging low on one side? Here, this should help.
How to Adjust Bra Straps
http://www.wikihow.com/Adjust-Bra-Straps
...use this only as an emergency technique as a stop gap measure until either me or beldin can be reached for a professional adjustment / front end alighnment. All complimentary of course.

Liberals are like a "Slinky". Totally useless, but somehow ya can't help but smile when you see one tumble down a flight of stairs!