Medical abortion

Hello! I’m from Norway, and I got a medical abortion at 6 Weeks, almost 4 Weeks ago. The nurse hold me that, after 4 Weeks you should Get a negative pregnancy test..

The first test is from 4 Weeks ago, and the second is from now (almost 4 Weeks after the abortion)

Should I be worried? Should I book a doctors appointment, to Get some bloodwork done?