Stylus not recognized on Photoshop

Hi! I'm having an issue with photoshop, and was wondering if you guys can help me. I draw often, and use Photoshop bevcause it's easiest. Since I have a Lenovo Yoga, I can just flip the computer around and draw using a stylus. 

Suddenly, however, my built-in Lenovo stylus stopped working on Photoshop. I could still draw with my finger/mouse, but not the stylus. Thinking it was an issue with my stylus, I bought a new one (different company too, so not the Lenovo stylus), which worked on other art programs, but not Photoshop. I'm just not sure why no stylus is working on my Photoshop, and I'm wondering if you guys would be able to help. Thank you!