First grow, bugs?

Hey guys I'm getting worried that I may have bugs. Plants have a little bit of spots and stuff they popped out of soil 2/22 and this just showed up. I have a 100X microscope but I have a hard time seeing stuff through it sometimes for some reason. And the plants are so small I don't wanna take a leaf off and put it on a table to look. I have some Azomax and one of those sprayers where you pump air in for a real fine mist. Any info will help thanks, really hoping they're ok and that that's not what it is.
Here's all 4 of my plants.

After you water keep an eye on the lip of the flower pot. Spider mites like to run to that high point after getting flooded with water. Then you will be able to see them no prob, if they are there

Look under the leaves.

I looked under the leaves before but couldn't tell, just tried the water thing didn't really see anything. Idk why there would be little yellowish spots on some leaves though. I did spray them with some Azamax last night before watering tonight though.

Looks like you may be over watering a bit...