How do I get these pimples to go away?

I have never really got acne, and if I did, it would be one here and there normally around my period. But now I am breaking out all over the one side of my face and I have one pimple on the other side. I don’t know what I should do to treat it. Does anyone have any recommendations, also something to note is that I think I’ve been sleeping on that side of my face more, so I don’t know if that has anything to do with it?