Are 2 pillows or 1 pillow better for your neck?

I have had a stiff neck for about a month. I am going through a stressful period right now. I thought the stiffness is because of that.

Now I started using two pillows instead of one. My neck feels a little bit better.

In your experience, are 2 pillows better or worse for your neck?

Also what did you do if you ever had a stifff neck? Thanks