period 3 days late .. negative results

Chelcie • 26👱🏻‍♀️ Mum to 2 girls 🫶🏼 Adhd/Bpd 🧠 England 🌍
We did the deed before, during and after my "fertile window" but 
** also during my fertile window I had 3-4 days spotting but still had sex anyway.. 
period is now 3 days late but negative results i used the 6 day early tests too!! could my spotting actually have been a extra period and then I'm not due until the end of the month?🤔 march period 14-18 and then spotting 27-30th period due April 14th