Spotting

I stopped taking the BC pill about 4-5 months ago. I had break through bleeding at the stop I started however I am spotting today (5 months later)...I was ovulating about 5 days ago however and I did have sex two days before and the day of. Is there a possible chance that this is spotting from leftover birth control (from months ago) or am I spotting? 
Stuff like this can freak you out lol thank you!