Braxton hicks?

I'm 34 weeks and all last night I couldn't sleep because on my left or right sides even with pillows propped under me, I was cramping a lot. Throughout the day today, I've been cramping and getting pressure in my lower abdomen and back pain. I called the nurse & she said it was round ligament pain. But now for the last hour or so, I've been getting pressure in my lower abdomen every 5-8 minutes but it's not painful, just uncomfortable. My husband and sister in law think I should call my doctor & go get checked but I don't wanna overreact. Are these just Braxton hicks?