I need reassurance

I want to start off by saying I'm 35 weeks. As usual I woke up this morning to pee but I had some unusual symptoms going on at the same time. As I was getting back in bed, I started to feel mild cramps on the lower part of my back and lower part of my stomach. They were of course tolerable but definitely were bothering me because I was able to feel them. I then felt like I needed to do number 2. The cramps would last at least a 1 min, go away for a few seconds then back for a minute. I just want to know if this is normal at 35 weeks? Am I suppose to start feeling these symptoms?