Re: noise in the front driver side wheel?
well it could just be that the pads were trying to tell you "hey im making noise, i could need new pads, you need to have me looked at" which apparantly you havent done so now it could be in the "hey im grinding away at your rotors because you ignored my prior cry for attention"mode. Stop reading/guessing and pull a wheel off NOW before you have more and more expensive repairs. If it did indeed start as a frozen pin that means one of your pads is in constant contact with the rotor so its like you are keeping your foot on the brake pedal all the time. some pads will make a screeching noise when not applied to let you know its time for brakes. the longer you wait the more parts will be required. if they are dragging that also means excessive heat buildup(smelled anything funny lately) that heat can cause brake hose failure which means loss of brakes and pumping your fluid out on a very hot surface that can under perfect circumstances catch the wheel on fire. get the point?
and just in case i didnt make myself clear brakes are the single most important componant on your vehicle for both you and your loved ones, as well as the general public that share the road with you
if you had some automotive backround then you could make an educated guess as to whats going on and decide if its dangerous or it can wait, but it sounds like you dont have that knowledge so you need to err on the side of safety and get it checked out asap