Uy, totally normal yan sa first trimester! Ang heaviness at bloating ay dahil sa hormonal changes and how your uterus is growing, kaya parang laging puno ang tyan mo kahit konti lang kinain, a few of us moms felt exactly the same around 10-12 weeks, parang hindi makahanap ng comfortable position. Best to check with your OB though para ma-rule out kung walang ibang concerns, but honestly, this phase usually gets better once you're past the first trimester, so hang in there mama!