My body's playing tricks on me :(

Rebecca
After I stopped bleeding from my MC in June I took two HPTs that were both negative so I started using OPKs since I knew my cycle would be wonky and my midwife said it was fine to try right away. I ovulated about a week from when the bleeding stopped (confirmed by OPK and I felt it). Today is DPO 11. I was pretty crampy 9 DPO, and honestly a bit crampy days before that. My CM has been creamy for several days and my CP has been high/med, soft and closed just like when I was pregnant last time. Yesterday I randomly was nauseous off and on until I ate something, which has only happened to me during  pregnancy. I tried to tell myself it could be psychosomatic. Last time I only had a very faint positive at 12 DPO and a clear positive at 13 DPO so I know it's too early but I tested anyway and it was negative (not surprised). The thing is, my BBT seems to be dropping. Not by a lot, and it technically went up today but not by much. Last time I had a clear triphastic rise. So I'm starting to wonder if my body is just acting pregnant since that's what it was used to, but my progesterone might actually be dropping. I guess I'm not looking for advice since I know no one here is psychic but I'd love some support. Anyone else dealing with this?