The Friken Patch

I’m on the birth control patch. I’ve been on it pretty consistently for years. It works great! I’m on my first patch this month and when I went to go take it off, it came off WAY too easily. Usually I have to rip it off like a bandaid but it seemed like only the outside edges were stuck down and the center wasn’t. Has anyone else dealt with this? My boyfriend and I had sex this weekend and according to my chart this is when I should be ovulating. Yes I’m aware that birth control basically prevents that. But should I be worried? And if this has happened to you before, what was your experience?