I am on Larissia this pill:

is this a low dosage pill? I’ve been on the pill for a year. I am experiencing breakthrough bleeding and I can’t find out why. I had a normal withdrawal bleed last month but started experiencing breakthrough bleeding recently. I haven’t had sex since my last withdrawal bleed. I take my first sugar pill this sunday. I heard breakthrough bleeding is more common in lower dosage pills. Is that what the issue is?? :/