Kicking my butt

So.... I'm not quite sure how far along I am yet. Per my last cycle (which was only 3 days) im currently 5wks and 2 days. My husband and I are thinking I may be further along. I've been completely exhausted. I can literally sleep all day and then some. My boobs are huge already and I feel like I'm either showing already or just super bloated. Not to mention the need to eat more often to avoid getting sick. This is my second child and I know they say every pregnancy is different... but holy crap. I don't remember any of this happening sooo soon. Can someone help me out?