I have recently found out I’m pregnant with baby number 2, due to my cycle being 40 days, different apps are saying I’m between 4-6 weeks.

I have a dull ache on my lower left side, it’s been there about a week (before I knew I was pregnant) it’s not getting better but it’s not getting worse and I can sleep/work/eat etc. No other symptoms and the pain feels like a memory pain I have of my first normal pregnancy (daughter now aged 2) but I’m freaking out. Anyone else having this?