pain and discomfort at 34 weeks 1 day

I'm 34 weeks 1 days and I've been doing a lot of walking today to get everything ready for my babyshower on the weekend since I'm helping with it. (I know it's not good to know about it but I stay home and I wanted to help). I'm having constant pain after taking a Claritin which my doctor said was ok since I'm allergic to dogs and have to be around them. It's start pains an inch to the right of my belly button and pain in my back like it needs to chrack right above my tailbone. Is this ok? I don't have my doctors after hours number and I'm not home right now. I'm at my parents house.