belly growing fast?

[MommyPaws]

i'm about 4-5 weeks pregnant, didn't go to a doctor yet, and i think i'm showing..i'm average weight, and i gave birth to a baby boy seven months ago, since then i had a great appetite and i've gained few kilograms..i'm not over weight...and i think my belly got bigger over the few weeks, i googled it and lots of women say that with second pregnancy their clothes started being tight from 4,5, or 6 weeks, and that jeans wouldn't fit them anymore... i didn't think i'd start showing so early? :/ i'm not bloated..  and i don't think its because i eat a lot.. (i actually didn't eat loads for about a week, because of nausea)
is anyone else here, second time pregnant and showing early?
could it be twins? (i haven't went to doctor yet, so no ultrasound or heartbeat)
and my breasts are bigger aswell, just about fit into my bra :/ with my first pregnancy my breasts didn't get bigger at all...
and i showed my belly to my fiance and he said i must be more than 4-5 weeks looking at my belly :/

[summergurley]

If you're only 4-5 weeks, your baby is still just a group of cells. Therefore, whether you feel it is or not, it is just bloat. The other girls were bloating as well making their clothes feel tighter early. Your baby isn't big enough for it to be causing the belly.