I wouldn't worry about it either!! This is your first quilt and you should be proud of it "mistakes" and all. Though I must say, I pretty much always have seams off and points chopped in all the quilts I do and I love them (even though they weren't on purpose)! They show me that I still have more to learn. The day I make a perfect quilt is the day I will stop quilting.
Cheers!
Rachel