Cat just jumped on me

Jen
I just found out that I'm pregnant (finally) so I'm about 4 weeks and my 15 pound cat just jumped on my lower stomach. It just feels a little sore right now, like something just use me as a springboard, but no serious pain. Should I be concerned at all?  I really don't want to have to start calling my dr for things like this already if I don't have to.