When to be concerned about your period

Hi ladies, I was on the depo shot for about a year and a half, made my period completely stop. After I got off took me about 4-5 months to start again and ever since then my periods have been so light and just everywhere. It’s been two years since I’ve been off and whenever I have my period it’s so light. I don’t go on a pad only when I pee. When should I be concerned? Whenever I explained this the doctor would say it’s because of the depo. Somehow I’m still so concerned it doesn’t seem right???

Edit- to add, I’m lucky if my period even later two days. It just seems non existent, I hardly even bleed. Today I just started and it’s so light and comes out only when I pee, already seems like it’s going to finish