your plants are real nice, i think you should use this as a continued learning experience. if you fix them, you have learned a lot and should have a nice yield still. if not, i bet you still learn something, and maybe get enough yield to make some good BHO (butane honey oil, can be dangerous to make but good stuff.) i have never encountered shrooms of any variety around a grow. it happens natural, so maybe not all bad. but there must be something in the soil that is a little off to have made them to begin with. i would transplant, then fog.
i just read they are 13 days in flower. most people here will tell you to stop treatment of stuff in flower, depending upon circumstances. i think you may be able to still fix in flower. but i think, if you have it in you, and i will get slammed for this one, if you gradually raise your light schedule up to 16/8 or 18/6 at 30 minute a day increments, and make them veg a little you will have more time to fix. thats an off the wall solution, but you will have more time to think about it in veg, and could maybe regain yield.
or, take a couple of clones, trash the plants, scrub the tent, room, pots, buy soil, and start all over.
which one sounds like more fun? i think if your now close to the point to give up, then you should really consider all legitimate options. i couldnt bring myself to kill those beauts, despite the problems we see!