3 weeks pregnant with second baby. Feeling pressure in the pelvic area

I know typically they say you don’t really start to notice pregnancy symptoms much before 4 weeks, but I am having some. This is my second baby so I feel like I am maybe a little more aware of every new feeling in my body. I have had a little nausea, a little cramping, and also some pressure in my vaginal area. It’s making me nervous like it could be signs that I may miscarry. I hope not, has anyone else had this so early? The cramping and the nausea don’t really worry me cause I had that last time, and I do remember having some pressure down there last time earlier than I thought I would, but not this early.