Overheated, now clutch won’t fully disengage/high idle

A few buddies and I went riding last weekend in some soupy mud and my radiator got clogged without me knowing, and the wheeler overheated and went into limp home mode. Stopped immediately and splashed some cold water on her and waited till the limp mode was gone and kept riding. The process repeated about 3 times and had no trouble the next day. This weekend I got the wheeler out (the radiator was clean of any mud/debris) and it overheated again. I realize the radiator could be swelled and I may have to get a new radiator. The thing that concerns me is that I noticed that there is a high idle now and the clutch won’t fully disengage. When starting for the first time it idles around 1800rpm, before it idled around 1400rpm. While in any gear after letting off the throttle the clutch will not disengage, period. I have to manually stop the machine with the brakes and then it will disengage. I changed the oil and everything looked like it normally should. To add, the machine has about 2000 miles on it and i haven’t touched the belt or any clutching. I’m puzzled and almost a bit scared. Please help!