when did you start showing?

It's my first pregnancy and I'm 9w5d and I feel like I'm already showing... my stomach wasn't completely flat before but it's like I can't even suck in anymore. No chance it's twins. I've been having some moderate round ligament pain the last few days... Haven't gained any weight yet... is my bloat just out of control? How early did you show in your first pregnancy? I have a wedding I'm in this weekend and I don't want to give my secret away yet!