That sounds like contractions my dear. You should probably time them because you're way early. If you get more than 4 painful ones in an hour, call the dr.
I had that too when I first found out but I was never out of breath when I was. now I hardly can. earlier today I was having really bad back pains and pain in my abdomen area
Before I found out I was pregnant I was cramping and thought I was going to start my period. I was 5wks when I found out and the cramping lasted at least 2-3 more weeks after finding out.