Very very light cramping?

Alie

The past few days Ive had very light cramping on and off. I had it a bit during the first trimester but seems to have come back at 17 weeks. I have an appointment in 3 days so I’ll ask my doctor but wanted to see if anyone else has it too or have asked their doctors. We had an ultrasound last week showing a healthy baby and heart beat and it’s not painful, just very light. So I’m not too worried, just curious.