I am very scared

Everything seems so unreal right now. And I am very afraid and scared because I had a ectopic pregnancy in January with surgery and partial removal of my left tube. Now I tested positive 5 month after the ectopic and I can't wait to call my doctor tomorrow morning but I am very scared that it will happen again. My doctor told me that when I get pregnant again I have to come on right away for blood test and that ever two days. 
I know nobody can help me with this but this rainbow baby is the light on the end of the dark tunnel I am going through since January. Just had to let my emotions go thank you for reading