Long term user now breakthrough bleeding - help

I have been on the pill for 6 years almost same pill micronelle 30 (or levlen) I’m severely anemic so use to stop periods as long as possible - break where I spot - last break was 1 month ago I’m spotting again , usually I can go minimum 10 months of no placebo pills and no bleeding at all then a 7 day break where I bleed for atleast 2 weeks - contemplating a stronger pill? What worked for you if you have had this issue