Is it safe to do all this walkin and shoppin?

I live in the country and want to finish up some shopping. This would mean I'd have to drive 40 miles then an extra 30 to go shopping. My question is with me being 36 weeks would it be okay for me to go all that movin around then store hopin? I reaallly need to finish getting her stuff but don't wanna cause my self to "walk her out" I don't think I'm having contractions just some lower abdominal pain and soreness on my bones and muscles