I would seriously guess it is from the ring. Although, some people get that from getting of the BCP. As soon as I got off from the pill for my DD, I got preg. We were trying, but expected it to take MUCH longer. Anyway, this time I got off the pill and it has been 5 cycles. So...I think it depends on a lot of things. Doctor's don't assume anything is wrong until you haven't had a AF for 60 days. So, unfortunately, you should wait until you have missed 2 cycles to get any help. That is how it is here, anyway. But, you could check with your doc. Wouldn't hurt. But, I would guess that your hormones just need some adjustment. Plus, you had a baby not too long ago. Those wacky hormones of pregnancy are still in you too. Good luck! Hope this helped.