IPhone 3G screen keeps flickering?

So i've dropped my phone and stuff before but never had this problem and everything was going fine but then today i went for a run and turned off the phone and put it in my sports bra. I ran for a half hour and when i came home i turned it back on and was texting and noticed that the light keeps flickering it will get really bright to dim and rapidly changes from light to dim. Is this just a problem that will go away on its own? I don't want to bring the phone in because i don't have insurance to fix it or get a new one i've only had it for about 6 or 7 months and if it can be fixed how can i do so?

Bacon

On an unrelated note (just like your question) I took a huge dump.

Buy the insurance today

run over it with your car next week

replace it with an HTC EVO

You want some cake?

Maybe your auto brighteness is on.
Btw this should be in cell phones & electronics.

That shouldn't be in this subject, this should be in computers and internet, anyways, try charging your iphone, and try to NOT dump it in any kind of liquid, and if it doesn't work after the charging, probably the little lighting switch is broken, ask tech support.

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