I'm so self conscious about getting really big I've always been really little and nothing is getting…

I'm so self conscious about getting really big I've always been really little and nothing is getting bigger but by belly I feel like I look like a chicken big belly and itty bitty arms and legs (I weigh 142 at 27 weeks) is that too big .. and my fiance want even let me get up to do anything at all cook, clean, were cleaning our pool and he want even let me wash the walls.. His grandma (magrand) Will hide my dish detergent and laundry detergent an all other cleaning supplies so I want do anything "too much" for me. it's getting old but I don't know how to tell them without being mean..