Could I be pregnant?

My period ended Nov 27th.. I had unprotected sex (bf came in me) on Nov 30th and took the morning after pill (take action) hours later. My fertile window apparently started 5 days later.. I know I took the morning after pill and that the symptoms I’m having could possibly be from that but I can’t help but to be nervous.. I’m having cramping & headaches and it’s freaking me out. I’ve also read negative reviews about take action failing so it’s making me nervous. What are the odds that I could potentially be pregnant? Is it likely? My period is due to come in 8 days so I’m guessing it’s too early to take a test and I should at least wait a few more days, but just thought I would get some opinions!