J.H.
Eeek, you're not on the pill while you're breastfeeding are you? If the docs told you its okay then they're full of it. Everything you consume goes into your breastmilk, and a single dose of hormones for you gets magnified by up to 20 times for your baby - and that could set him up for hormone and cancer issues later in life.
As for your emotional rollercoaster, it sounds like it could be your pill as well. After having a baby, your hormone levels are still going crazy, and adding more to that could send you over the edge - and once again, increase your chances of developing hormone positive cancer as well. Sorry, I'm not trying to freak you out, but I am a breast cancer survivor (dx'ed at 32) thats done a ton of research on the links between hormones, active cell growth, poor diet, and cancers. There are 3 times in a woman's life when those cells are most active - puberty, pregnancy and breastfeeding. And its during those times that mutant (possibly cancerous) cells can develop. If these mutant cells aren't destroyed by the body (as most are, we create cancer cells everyday, but if we're healthy they dont survive), the extra estrogen and progesterone can actually feed them and cause them to grow extremely quick and aggresive. That's how my cancer was caused, I took phytoestrogens shortly after breastfeeding.
I know that severly limits your contraceptive options, but I wanted to make you aware. Docs these days are slaying me the way they play with hormone meds regardless of the recipient. The biggest problem is that complications dont develop for years, so its never traced back. And anymore, the docs are getting more $ from the pharm. companies than they are from the patients, and its a very unhealthy incentive.