Hello!

I’ve been on my birth control for almost 8 years now. I was using a 91 day cycle pack and I stopped mid-pack (which was week 4 of 13). My question is when should do a pregnancy test? Before my birth control I was pretty regular. However I’m not sure how it will be now. I’m assuming the same. But I’m trying to keep an eye on my CM, having a hard time how to classify it. However, when should I test? My boyfriend and I had sex on December 6th. Then I had some bleeding for 7th and 8th. Then stopped entirely the next day. Was that a period? Or was it just withdrawal bleeding? Help!

Thanks!