Period after birth control pill

Prior to the pill and even when I was on the pill for about 4 years the first time, my period was pretty regular with needing to use a tampon. I went off for a while because I ran out and my period stayed the same. I went back on for a year before quitting completely to use Fertility Awareness Method instead to TTA and since then my flow has been EXTREMELY light. I mean, tampons the first day and then liners the last 2-3 light. I am not saying I hate it because it's pretty fabulous, but did anyone else experience this? I figured it was just the brand of pill that made it lighter while I still took it, but assumed it would go back to normal once I stopped taking it. This is only my fourth cycle off the pill.