Still no period????

Okay ladies so I know that not having a period while breastfeeding is normal… BUT I literally haven’t had one in coming up to 2 years! The last period I had was right before I got pregnant with my now almost 16 month old.. so I’m just curious is this normal still??? This is the first time I’ve breastfed exclusively & this long, with my other two the longest I lasted was a month & got by period by 3 months postpartum. Now I don’t exclusively breastfed anymore I only feed my son when it’s time for bed, naps & when he wakes up & sometimes just when he wants a snack but it doesn’t last long. He eats way more solids than breast milk. I just wanna know if it’s still considered “normal” or if I should go see my doctor 😂😅