Breakthrough bleeding with all pills

Ok I’m so upset and feeling like I’m going to stop the pill or birth control all together. I’ve been on 7 different pills in the past 5 years and all have terrible, heavy break through bleeding. I’ve been on them for a good 6 months or more before I switch to a new one. Before I had children, I was on two different pills and had none of these problems. I even could skip my period and still not get the bleeding. Has anyone have any ideas why? Is there a different pill? We have tried stronger ones and they don’t work either :(