Worrying myself sick (tmi maybe?)

Aislin
Had some very light light-brown spotting yesterday. Asked doctor google who told me not to worry unless it's heavy, red or accompanied by cramping. I was still a bit worried but I sort of carried on with the day, spotted twice more but then stopped, I was fairly calm until I got cramps in the evening. Like period pain, only milder. 
I wore a pad all night to check for spotting and now it's morning. No more spotting, no more cramping, nausea back in full swing and very sore boobs - but... I took another pregnancy test. The top test was taken 4 days ago (because I'm a worrier and I wanted to check the line was getting darker) and the bottom one this morning. 
I think the bottom one is slightly darker, but only very slightly (both FMU) I'm 5w4d  - over a 4 day period the line should have gotten darker right? 
The doctor won't see anybody until they're 8 weeks pregnant, so I can't just ring up and ask for answers. So now I'm incredibly stressed and I know stress is bad for baby which is only making me more stressed. Should I buy another digital with weeks or will that only worry me more? 

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors