What’s happening with my skin?! (21 year old getting acne)?

I’m a 21 year old girl and before the past couple months I have never suffered with acne. I would maybe get a pimple once a month but it would go away very quickly. Around November or December of 2017 I started getting a few pimples. Nothing major. But it’s just gotten worse. I stopped using a face lotion which I thought may be causing the pimples but it hasn’t stopped. I’ve been getting pimples on my forehead, chin, nose, and right below my nose. I currently have at least 10. Some are white heads but some are under the skin and very painful. I haven’t changed anything before this started but now I’ve been using higher end face washes and a light water based face lotion before bed. I did shave my face before this started a couple times to get rid of peach fuzz to allow my makeup to go on better but I stopped shaving when I thought it may be a reason for the acne but still nothing. I don’t even use foundation because I don’t want to make it worse. Any tips to get rid of the pimples and prevent new ones?! Please help!!! Will pick best answer.