Whether to take a test???

I’m at 3-4 days late from AF. The latest date we had sex was about 24 days ago. I never noticed when I ovulated. Since that time frame ( the latest date we had sex was the 20th-3 days after AF, 23rd-6 days after AF 26th-9days after AF & we had days later too). I’m new to this. So need some advice!!!! Help

( ohh and this might change things, I stopped taking my BC around 12/4 )