Cramps at 33 weeks

For the past couple of days I've been getting cramps that feel like period cramps. I wouldn't say they are regular or consistent, I've probably been feeling like a few times each day. Although already today I've felt them more often than I did the past couple of days. Is this normal? I have an OB appointment on Thurs and plan to bring this up but curious what others have experienced at 33 weeks.

This is my second baby, and I had my son at 38 weeks. I remember starting to feel cramps in my lower back when I went into labor, and was getting them about every 45 mins to start and then it quickly picked up. I left for the hospital about 4 hours after it started and was 5.5 cm dilated. This cramping feels a little familiar to that but definitely not regular or consistent.