I took a break from drawing with Photoshop and it was buggy when I reopened it. First, the pen drew only very thin lines, same width regardless of the settings. Once I fixed that in the brush settings, I realized that the width of the line was no longer changing with pressure.

I would like it to taper, thinner with less pressure, thicker with more. Has anyone else had this problem? How do I fix it? I'm really frustrated and thinking about uninstalling and reinstalling Photoshop.

I took another break from Photoshop after fixing the first problem because it was still buggy, but I think the size jitter got turned off and that was what was causing my last problem.