So confused. Any ideas?

Lyn ☀️ • Step Momma to two amazing guys- 19 & 17. expecting march 2019.

So Saturday was the day after my AF was due. I tested and got a faint line. It was faint but absolutely there. Tested Sunday and there was NOTHING. Still no AF so i tested this am and saw a faint line. What the heck is going on? My dr won’t do blood work. Said to wait a week and test again. Has this happened to any of you?