16w+2 how do you know if you have anterior placenta?

This is baby #2. I’m 16w+2 and I could feel my baby girl a lot around 11-13 weeks. Then I hit 14 weeks and I haven’t felt her anymore than a few bumps here and there. I don’t know if I have anterior placenta, but I’m convinced I do.

When did you find out? And does it cause any risks for delivery? Is there anything you can do for it? I have my anatomy scan at 19 weeks, will they be able to tell then?