The owl was called Bubo (yes I'm a sad individual)
Now then, young lady, as per previous answers you'd best get yourself to the GUM clinic, it might also be an idea to get yourself a pregnancy test just to be sure, you could be getting yourself all worked up and is making you late.
I hate to reiterate that you are too young to be having sex and boozing, the laws are there to protect young women like yourself. Hopefully you can be sorted out quite quickly and your mind put to rest, it's a shame you can't confide in your mum, is there someone else that you could confide in. A problem shared and all that.