Ah, normal yan mama, lalo na kung irregular ka na rin dati bago mabuntis! A few of us moms sa circle ko had the same thing, after we stopped pills, it took months para regular ulit or some stayed irregular talaga, especially if na-breastfeed pa kami for a while. Since 17 months na ang baby mo and you're not on pills anymore, it can take a few more months para ma-settle ang cycle mo, pero worth checking with your OB kung patagal pa rin or if there's anything else bothering you, just to be safe lang.