I wouldn't have known you made a trimming mishap if you hadn't said so. So I wouldn't worry about it, just let it grow back out and reasess after a few weeks.

I don't really have much experience with carving cheeklines so I'm afraid I can't give you any pointers in that regard but I'd like to point out that a cheekline doesn't neccesarily have to be a straight line or a curved line or anything like that, a natural cheek line looks the best in my opinion a lot of the time (not always though, but a lot of the time).

Even though you made a bit of a trimming mishap it's not as bad as you think, people won't notice anything unless you tell them or if they are studying your face up close, which I highly doubt anyone will do unless that person is romantically interested in you image