Severe pelvic pain and back pain

I am 32 weeks pregnant and I went shopping yesterday walked so so much.  We slept in a hotel and I woke up with back pains mainly in my right side and period like cramps on my right side. The baby is kicking like normal. I looked it up and it saids those are two symtoms of early labor. I also woke up with severe pelvic pain not pressure, I do normally everyday have bad pelvic pains but you think I over did it yesterday or could it be early labor??? I am nervous I am about 2 hours away from home.