I'm happy to say you can continue to take it at your most convenient time and expect it to be as effective as ever.
The instructions on the packet usually say that if you take it within 12 hours of your usual time it has no impact on the effectiveness.
Taking it at the same time everyday however is still strongly recommended, not necessarily because of effectiveness, buyt because it makes a huge difference in how easy it is to miss a pill when there is no routine.
Long story short, it sounds like you're good to carry on as normal!
"In between two tall mountains there's a place they call lonesome.
Don't see why they call it lonesome.
I'm never lonesome when I go there." Connie Converse - Talkin' Like You