What causes the bloating?

Li

I am 7 weeks and 4 days. And i look big it's my 2nd baby. I loved my 1st pregnancy with my daughter because I never had any symptoms at all just my belly growing. But this pregnancy I fell the sickness, low appetite, cant eat much because I feel sick and my daughter is so so attached to me..what's going on with this pregnancy??🤔🤔