2000 EX help please! AHHHHH!

Hey guys! I was just browsing the internet and came across this forum. I am a complete noob on cars and I know pretty much next to nothing. I have a problem and was hoping that someone might tell me what it could possible be. The other day I left my fog lights on and that completely killed my battery. After 2 hours of trying to jump the car I realize that it was maybe time to buy a new battery. So me and my friend unscrewed everything and replaced the old battery with the new and put back all the wires(i think) to the original location. My problem is when I am driving, idling, parking, or applying the brakes I hear this very loud and annoying clicking noise that goes on for a few seconds (it kinda sounds like a wood pecker). I never had anything wrong with my car and it never made this sound before only until after I swapped batteries. Do you guys have any idea of what it might be? I don't want to take it to a shop if it's just a minor issue that can be fixed by myself. Could it possibly be some wiring issues? Thanks for taking your time to read this.

oh yeah I also have a problem with my brakes, I changed the brake pads like 3-4 months ago from a tune up and now I hear hardcore squeeling and a loud click when I apply the brakes. I also hear a faint squeeling sound when im driving 5-10mph. Could it be that the brake pads are worn out already and that I sould get new ones?

Again thanks to those for reading.:p

Lisa S.

hmmm ..im alittle stumped as to why u hear this clicking noise after replacing the battery.. have u been able to pinpoint the where abouts of the noise? aka passenger side or driver side? with the car off make sure theres nothing hanging over any belts or by the radiator or a/c fans .. but again if you are still having this noise .. try running the car with the hood up and let me know where abouts ur hearing this noise..and as for ur brake issue .. 3-4 months and hearing bad squealing already is way too early .. i'd have the brakes inspected .. might have a warped or glazed rotor causing them to wear prematurely .. does the steering wheel shake or does the car jerk at all when applying the brakes?