Desperate for feedback!!! What do these symptoms mean?!

Shana
Okay so I've posted a few times throughout the past week and haven't really got much of a response. I've been driving myself crazy reading articles and blogs online. Here's my timeline from the last few weeks.
- 12/28 - 8/9 DPO We were out for my birthday and I was eating paella for dinner. I love seafood but this just tasted strange and off to me and I vomited within just a few minutes of eating it. My husband had the same thing and he was fine. 
- 12/29-1/3 - 10-14 DPO - I've had nausea every morning and can't really eat breakfast. If I did, it would be hard to keep it down. I've also been cramping on the left hand side and had backaches, headaches and strange dreams. I was so tired I would have to take naps and that never happens to me. AF was due 1/3 and never showed. Every HPT I took was a BFN
- 1/4 - 15 DPO - cramping and nausea but no sign of AF. 
- 1/5 - 16 DPO or CD 1 - I woke up and when I went to take a HPT with FMU, I saw spotting when I wiped. Pink. I thought it was AF and put on a pad. Nothing was on the pad the rest of the day and only brown discharge when wiping. 
- 1/6 - 17 DPO or CD 2 - same thing in the morning with light pink blood/ spotting and nothing on the pad from the night before. Nausea all day. Couldn't eat anything until 3pm. 
I called the advice nurse and emailed my doctor asking for a referral for a blood test. The nurse said I could be pregnant but I'm so confused and concerned. 
I keep thinking it's either a strange and light period, a miscarriage or ectopic pregnancy. Proof I'm just driving myself crazy. 
Has anyone else gone through something like this or have any feedback? I have to wait to hear back from the Doctor now and the nurse said now to use a HPT until next week now.