7 weeks and clothes are getting tight?

ph

I know I'm only 7 weeks but I can't remember being like this with my son (this is my second pregnancy)

Is it normal to get like this early on? First picture 4 weeks and second picture 7 weeks.

Also I haven't gained any weight, been weighed etc. My clothes are feeling tighter then usual, my size 6 jeans are a no go!