I live in an apartment on the first floor, and for the past few days, my pipes have been gurgling whenever I or someone else above me uses water. And yesterday my toilet overflowed when I flushed it with nothing to clog it up. This is continuing, but I can get it to flush if I hold the flapper up.
What could be the problem?

You need to contact the landlord before the MAIN DRAIN totally clogs up and your place gets flooded with raw sewage. Here, if the main drain becomes totally blocked, especially when you aren't home, you could end up walking into a POOL of sewage!! Your landlord (and you) will appreciate a heads up here!

Good luck!

Mark

Double trouble! You have a blocked vent and a partial blockage in the toilet drain line. The solution would be to snake the vent from the roof and then pull the toilet and snake the main drain. When you snake from the love put out enough snake to reach the base and 15 feet more. Good luck, Tom