Odd sensations/cramping with very light spotting

I'm 19 1/2 weeks with my second. Today was a busy day at my shop with it being Valentine's Day. I'm lead driver but took smaller routes with nothing weighing more than 5lbs since I had additional drivers.

I've had cramps/muscle spasms on and off entire pregnancy along with many stomach issues. Recently had two days of constipation. I also had a yeast infection that I ended script meds last night. I have felt small movements of the baby, but mainly like a rolling feeling.

Today I began having at times sharp cramps/muscle spasms low, then a few times while wiping had slight spotting of pinkish-red, barely enough to say.

My fiance is already upset I didn't have a runner half the day so all I had to do was drive so I am pins and needles about telling him. My Mom and good friend said that I should call my doctor that she may have me go to the ER.

I was given tomorrow off to rest, so I was thinking of calling as soon as I got my daughter to school in the morning and go from there.

Has anyone had anything like this happen and end up being nothing? Should I call tonight or give a call in the morning?