6 weeks today but feel like 20😕

I’m supposed to be 6 weeks today but I feel and look a lot longer. Haven’t seen the doctor yet. I go in 2 weeks because he won’t see me until 8 weeks. This is my second pregnancy. Could this be why I’m so bloated or could there be 2? I feel so weak and I cannot eat. I’m literally nauseous 24/7 idk what to think.