i need acne help :(

long story short i had super clear skin in the summer, it was amazing. school started and day by day my skin slowly started getting worse. it’s now winter and my skin is the worse it’s ever looked and i have no clue why! i drink SOO much lemon water each day, i wash my face i have a whole skincare routine. so if anyone knows some products or anything that will work like magic help a girl out ❤️