First period PP?

I was EBF (was hoping to continue until she reached 12-18 months, but she has begun to self wean unfortunately), but now at 9 months old and with the intro of solid food, DD has cut back from 12-14 feelings per day to only nursing for comfort at nap time/bedtime, maybe at most 4 times per day. It's been this way for almost a month and a half now. Over the past month I've felt bloated, exhausted, nauseous, and moody. At first I wondered if I might be pregnant again, but all tests have come up bfn. What I would like to know is 1) has anyone else experienced pregnancy symptoms when they began to wean and 2) how long after you started the process until you had your first PP period?