www.omgbridge.com What is bridge? Learn to play. (made at xtranormal.com)

College students enjoy playing rubber bridge in the student union between classes.

So, about 3 months ago I had a job offer for an entry-level environmental scientist job which I decided to turned down. I turned it down because I was extremely burned out from college, and need to rest up for a while. I also wanted to see what else was out there, since my original plan to go to graduate school was dashed at the last moment and I suddenly found myself floundering through the job market.
Well, I’ve had my rest and looked at what else is available, and I see now it was a pretty good offer. The position, or one similar to it, is likely to still be availible since, as I was told, the company is overwhelmed with contracts and desparately needs more people.
Is there any acceptable practice for contacting them and seeing if there is still a position availible, or have I, as my dad likes to say, gone and burned my bridge and now have to deal with it and find emplyment elsewhere? What do you think?