? Ectopic or viable pregnancy

Kaitlin • Nurse and Nature Lover. Endo Warrior 💪🏼💛 Fibroid Tumours & Adenomyosis. TTC 3 years. Trying for a Rainbow Baby! 🌈 2x IVF 8x FET Zoladex and Beyond 🚀
Sorry guys.....me posting AGAIN cos I'm Stressing out. 
7 days late and have literally had 3 tiny light brown spots in 3 days. Boobs sore, cramps and feeling light headed. Actually completely off food. Been testing by every day and all BFN's. Apparently this can sometimes mean that you have an ectopic?! 
Anyone have an ectopic and want to share their experience? My doc said to come in tomorrow and I am freaking out as just miscarried a few months ago and an ectopic would just be devestating.  I am so stressed I could vomit. 
Alternately, anyone been really late and have BFN's and then went on to have good hcg levels and pregnancies? I need to know! 
Thank you ❤️