stomach tightness

yes for me started as early as 20weeks. personally i realise its a signal frm my baby to change position or relax more.. usually my tummy will feel tight if i sit too long/doing too much housework etc. if im standing, i try to sit down and rest and the tightness will go away. if im on the bed, i change sides/get out from bed awhile and walk around the room then i feel better.