How do you train puppy to stop nipping?

My puppy (3 months) has been nipping like crazy this past few weeks. I understand that she’s teething so I’m not frustrated or anything with her but it’s come to the point that it kinda hurts and she’s starting to really bite down. At this rate I’m not sure if it’s just teething anymore if this is what she considers playing. It’s become difficult to wipe her face and her teeth

She has a bunch of toys, I’ve tried redirecting but it doesn’t work. I’ve tried yelping but I know that may only excite her more (also I fear I’ve encouraged her and became her favorite squeaky toy by doing that). I’ve tried freezing and ignoring her but in situations where I’m on my way out or trying to do something, it’s not the most reasonable. I’ve read that softly muzzling the puppy with your hand and saying no can be helpful but I feel kinda guilty 🙁

Pls help!!! Potty training hasn’t driven me too crazy but the nipping is driving me NUTS.

Thanks guys!!!