Rep Power: 0

Hey guys, this is my first time posting on here so I hope I’m not breaking any rules.. 😅
I have a 2001 Honda Civic EX 4sp automatic (built in Japan if that matters) with a little over 235,000 miles. Bought it with 217,000 and has run exceptionally well since I’ve had it. New timing belt at 214,000 miles, new water pump and a few other things around the same time.
Being 19 and living 3 hours from my family and any financial help, I’ve been concerned about a noise I’ve been hearing for the last few months.
Most of the time (not every time, however) I let off my gas pedal, usually when going at a lower speed, I hear a clicking noise that I believe is coming from the back of my car although I’m not positive. It also sometimes happens when my car shifts from 2nd to 3rd gear. I’ve done a lot of research and I’m guessing it may have something to do with the throttle body, but being as I know next to nothing about cars I’m not sure.
Has anyone else experienced this? My car still runs just fine, still gets roughly 30mpg even at such high mileage and has never had any problems starting or accelerating. I replaced the front struts, valve cover gasket and radiator in March. My concern is that it could possibly have something to do with the transmission, in which case I simply can’t afford to repair it since it would probably cost more than the value of my car to fix (if the tranny is going out). Could this be a simple fix or something more serious?
Any help is immensely appreciated, again I’ve never posted on a car forum before and have next to no knowledge about cars. Also I’m very young and don’t have a ton of money to spend on repairing a 16 year old car with 235,000 miles, although I know being a Honda it’ll run another 100,000 before it gives up on me. Thank you so much in advance!

 
Rep Power: 518

Before you waste a lot of time and money, you need to find out for sure where the noise comes from.

Then you can keep going to figure out what's causing it.

It could be something as stupid as golf ***** rolling around with the spare tire. Maybe the exhaust came loose or broke. There's a crapton of possibilities, you need to do your part to investigate.

WWSWD? (What would Stevie Wonder do?)

 
Rep Power: 211

LOL. Stevie is very Superstitious and Living Just Enough For The City. He'd tell his car I Don't Know Why I Love You and say I Wish my Cherie Amour wasn't making that clicking sound. However, Stevie lives by his motto You Haven't Done Nothin' until you've reached Higher Ground. He gets Uptight when his ride isn't alright and Overjoyed when he repairs it.

 
Rep Power: 0

I actually think the noise is coming from the front drivers side. Additionally, I’ve actually realized that my gas mileage has also decreased significantly, I normally get ~430 miles per tank and I went through almost a third of a tank in like 85 miles. I’m going to have a buddy look at it within the next couple of weeks.

 
Rep Power: 222

Check all your suspension parts, engine mounts

 
Rep Power: 134

Clicking would lead me to check the CV joint - especially if pronounced when turning.
If it is more of a growl - check the wheel bearing.