Worried Husband

My husband is getting worried about me as my tummy is getting bigger and bigger. Every time i get full i am having trouble breathing and my lower left side gets hurt really bad. He was teasing me earlier that it might be good idea if i just stay here instead and not going back home anymore. But i told him that i only feel this way if i am full and all i need to do is just a little walk here and there and i will be alright. Anyway, i am not going to eat a whole lot though during our trip with this little boy of ours, and i don't think i would like to be full and later on will be having hard time to sit and relax while on the flight.