Anyone ever get preg IMMEDIATELY after BC?

🌸🦋
Before I got on BC- I has a regular 26 day cycle. I started my BC on the first day of my last period (Feb 20th) I took my LAST BC pill on the 2nd Friday of the pack (March 3rd). I skipped out on the rest.. 
 Had unprotected sex the next day. Had spotting on March 7th with LOTS of EWCM. I spotted for about 5 days (was light bleeding everytime i wiped, never became heavy). 
Had sex on the 9th 10th, 11th & 14th. If i was still on the pack, I wouldve gotten my period placebo week (last week) but it never came. 
If I regulated right after that, my EPD was the 17th. I've been cramping since the 16th and if usually when I cramp, my period comes the next day. It's been 3 days. I took a test this morning and it was negative (but i saw an evap line maybe). Idk when I should test for preg. especially if I havent gotten my period yet! Help 😭
Have anyone gotten pregnant STRAIGHT off their pills?