second Baby

My husband and I just found out that we are about 7 weeks pregnant with our second child. We are excited however, this mama is worried! I am feeling things in this pregnancy way earlier than I did in my first pregnancy. Honestly during my first pregnancy I had very few symptoms. With this pregnancy I already can't stand anything "hugging" my belly, I feel "full" ALL the time and I feel the need to take a deep breath once every five or so minutes. Anyone have any similarities with their second pregnancies?