He has been hopping back and forth between solid and liquid stool, on top of that he has had a lot of mucus on/in his stool. I've looked it up and none of it seems good. I think I might have to scheduled a
vet appointment to look into this if the steps to calm his stomach down don't work. He has been normal otherwise, and not really lethargic or showing any of the other symptoms. There haven't been any major diet changes or him on any new meds or eating strange objects. ( at least its highly unlikely not impossible) that I could think of that would make him have these problems.

I know the vets I use has stool kits you can prepay and take home to collect a sample. That means you don't need to schedule an appointment, you just call and pick up the pre-labeled container, bring it home and get some poo, and then drive it back. My vet will call with the results the next day, so it's really fast. If they do find something, you might have to make an appointment. But, if you just wanna get the results of a fecal, I think you could probably do that now without the hassle (and cost) of a full checkup. I'd give them a call first, but that's how ours does it.