Spotting and when to call?

So I had some spotting that happened in the middle of the night about 3 weeks or so ago. I ended up calling my midwife the next morning to tell them, to which I was told since it was so light, to rest and if it continued to call them back and they’d have me come in to be checked over.

Nothing else happened so I was good.

This afternoon, around 4:30, I randomly started spotting again. More than before, and this time it wasn’t just when I wiped. It was showing up on my panty liner. I haven’t used the washroom in an hour or so, so I’m waiting to see, but this time there were some very tiny clots when I wiped too.

For fear of just being told to do best rest and if it continues, I thought I’d ask here what everyone would suggest doing. Would you wait it out knowing it could be nothing, or call and tell them?

I’m 26+ and just found out my cervix is starting to shorten, but I won’t know more about that until tomorrow when I talk to an OB that my midwife has asked to call and explain the ultrasound results to me.

Thoughts?

Update: Last time I used the washroom, it was just very light spotting now. So not sure what I should do.