not sure if my birth control is working??

Bailey

for the past four or five months, I'm not sure if I can remember correctly, I have had breakthrough bleeding and each month it has gotten heavier and lasted longer. I was put on this birth control when I was 16 and I'm about to turn 19 now. it is a very low estrogen i'm not very strong at all. I have also had acne to start coming back and my periods are getting heavier but I barely used to bleed so I don't understand. can someone help me figure out if I need to get put on something else???