4 weeks pregnant symptoms

Kara • Pregnant with our second and final Peanut. Our first is only 1 year. This is going to be one crazy ride!!
I found out I was pregnant five days before AF was due.  Have sore breasts, constant cramping  and an overall feeling of being sick.   The morning sickness already started. Couldn't keep my breakfast down.  Is four weeks a little early for morning sickness?   My fiancée says it must be twins. Lol