hi, when i fell pregnant with my son i was a size 8, by the time i was 9 weeks pregnant i couldnt fit in any of my clothes. so yes it is normal and i think it all depend on the indiviual. my son was born healthy without conplications.in and out the hosptial in the same day.
Are you sure your only 4 weeks???? If yes you maybe having twins as its not normal to be that big at 4 weeks especially if its your first pregnancy but it isnt anything to worry about it may just mean your expecting two bundles of joy or it may mean nothing at all every woman is diffrent but you might want to do some research on symptoms of pregnancy with twins to see if you have any of them
Actually i dont hav a good idea abt all these but i hav a point to share with u all that, a site m not sure abt name that you can search like "Live chat with a Doctor " yes that is Healthcaremagic there we can discuss any medical issue/doubt/query with group of doctors they are online there to discuss and provide second opinion, hope it may be useful for Sarah12892