Call the doctor?

Kennedy • Engaged to my soulmate! Gave birth to our little boy Kayden Kristopher 02.22.2016👶💙 Took 13 months of TTC with PCOS💕
Should I call the doctor if I got a faint positive on a walmart cheapie test and then a negative on an FRER 2 days later? I am a week late and no signs of AF only signs of pregnancy. I would be 5 weeks tomorrow.. I wanted to wait until I was 2 weeks late but I just want to make sure if I am that everything is fine and okay.. Like to make sure Im not having an ectopic pregnancy or anything is wrong..