12 weeks postpartum

Hey all. I’m about 12 weeks postpartum and I had what I thought was a period last week. It was super light and barely needed a liner most days. But now I’m very nauseated and almost barfed when I smelled coffee this morning. Not to mention the utter exhaustion. Has anyone else had a period thing like this? I’m so hoping it’s not another pregnancy. But I also realize hormones can still be crazy. My 2nd and 3rd are only 1.5 yrs apart and I’m having some ppd as it is. 😭