Low lying placenta in first trimester??

My patient portal thing says I have this. Why would they see that I have a low lying placenta and not mention it to me??! Ive been to two appointments since it says it was noted. I feel like it's kinda serious. And it says without hemorrhage but I have had some spotting here and there. 
Now I'm worried but I guess you can't see if it's gotten better or worse until the 20 week ultrasound which I'm not having until 23 weeks. I'm only 17 weeks.  Yay.....