When should I go get a blood test at the doctors?

Britney • I'm a happily married to the love of my life and I'm a 27 year old who is graduating university soon this year and is hoping to start having some beautiful babies soon! We have had one pregnancy and miscarriage at 7 weeks so far hoping for a rainbow baby
I have had three super faint positives and some negatives but I am five days late now with lots of pregnancy symptoms and my cycles are always on time or early by a couple days when should I get an appointment with my doctor?

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