Super painful, advice please

Trisha
Okay,  so I'm 30 weeks exactly today..so I'm sitting in the car playing with my son while he kicks inside me, when suddenly I feel the most uncomfortable sharp pains in my upper abdomen, both sides and in front. Almost feels like my ribs might break or like I'm being squeezed too tight and it's hard to breathe..this happened twice in a row..are these just Braxton hicks contractions? Or should I be worried?