TMI Warning . .. . PP Period
Answers: It's probably breakthrough bleeding. Pregnancy (and post-partum) means a rush of hormones through the body, and your body is trying to "right" itself after the hormone rush. Give it a few months (especially if you're breastfeeding) and if things haven't started to even out by next, give your doctor a call.
Congrats on the unusual little one!.
Because since for the last year or so you have be pregnant or nursing. Your body needs time to adjust to being fertile again, so it may be a while previously your ccyle gets back to typical. If you are just spotting, this is not your period. I spotted for reasonably a few MONTHS after I had my baby, I have her 11 months ago and still no period. It also depends on the BC you are using. The shot made me spot for a while without a time. Don't worry, your body is just adjust, it will get back to regular eventually