Possibly pregnant? Period late!

Hello! I need insight! I was supposed to start my period Monday-Wednesday, but have not yet and do not have the symptoms I normally get right before I start. I got my IUD out on June 3rd and had started my period right before I did on May 30th. My doctor told me to be prepared, because it would happen fast! I have taken several tests end of last week and early this week. But sadly, all were negative. Could I still be pregnant and it just be too early to tell? Should I take one in the morning to check? What are the best ones to do? This will be my third pregnancy, I had a miscarriage and then was pregnant with my now 3 year old! Thanks!