Spider mite webs are very distinctive from spider webs. Spider mite webs are much "tighter" if that makes any sense. Mites are tricky little fuckers, if you see webs from mites then you have mites.
Make some habanero pepper spray. Boil around a dozen habanero peppers (or hotter peppers if available) in some water, get it nice and concentrates and strain the liquid. And be careful, wear gloves and even goggles if you can. It'll sting your eyes if you sit in front of the boiling pepper mix without any goggles, but that's a great sign. If it stings your eyes being near it, just imagine what it'll do to pests.
Spray ALL of your plants with it, multiple times a day.
It can be used up until the last 48 hours of flower with zero negative effects, you won't taste it one bit.
Then, after your grow is done (assuming you're indoors) don't grow a single plant in the grow environment again until you sterilize the fuck out of it. Bleach water in a pump sprayer, spray and scrub every single last surface. Otherwise they'll just come back.
Control them ASAP, I've had a 6ft tall mother plant die within 24 hours once before. I'm not exaggerating when I say that literally the entire 6ft plant was completely covered in webs and mites.