when to test?

Chelcie • 27👱🏻‍♀️ Mum to 2 girls 🫶🏼 Adhd/Bpd 🧠 England 🌍
Af is due today, she hadn't come yet. 
I was fertile from the 26/03 to 01/04 and had sex them days but also I had some spotting during some of those days after having sex on the 27th.. an hour after I had pink spotting. And did so for a few days after.. 
My period was the 14-18march.
I've bought a test, I may do it tomorrow.. I was just wondering as I'm confused as to why I had he spotting, some say you spot when you ovulate?
I'm worried whether or not it could have been an extra period.. guess I'll have to wait and see.
But over all, would I be ok to test now with an extra early 6 days first response test? Thanks :)