Breastfeeding past 12m and period


Has anyone breastfed past 12m and not gotten their period until then? I’ve been breastfeeding for 15m now, we’ve cut down to just nap time and before bed and when we wake up, sometimes we don’t nurse in the morning.. I had an hsg test done Thursday and had spotting which they told me I would have, but then it stopped, Sunday I started bleeding again, and having cramps, I called yesterday and they told me it’s most likely my period because usually it’s just light spotting the day of the procedure and maybe the day after.. well my real question is, has anyone gone this long without a period and finally gotten it, is it supposed to be super heavy, or did you have a regular flow? I just have a regular flow, I haven’t had a cycle since 3mpp..