How to get rid on acne scars and why am i all of a sudden breaking out?

i have been breaking out since Jan/Feb and having scars now. I am 21 and never before have I had this problem. I haven't switch products, I eat healthy,wash my face twice a day,make up is clean and oil free, (same products as before), drink lots of water, had 3 facials,tried masks and a bunch of home remedies. I really don't know what it is. And I'm not stressed or pregnant. Please help!!!