why?

I should know better by now, not to get all worked up over something I have no control over.  I am upset that I allowed T to play soccer last night because the game was at 9:30 (which I did have control over - whether he played or not).  By the time he got home it was past 10:30 and I know what it's like playing so late in the evening.  I know I get a burst of energy after my games and, therefore, it's difficult to settle down and go to sleep.  So, needless to say, he isn't "feeling well" this morning.   I haven't called attendance, yet.  And I don't know what to do ..... since I let him play .....I am partially responsible.....so do I call in an excuse for him?  He says he has a pounding headache. I do believe that he does, but I told him he needs to go to school anyway.   I did get angry with him because I see the pattern all over again.  Brand new semester.....missing classes...falling behind.  I know I should let this go -- this is his problem but I feel somewhat to blame... Okay -  talked to T - had a heart to heart.  He went to school.  I know I am tryng to control this situation and it is affecting both him and me, negatively.  I must let go and let him make his own choices and if there are consequences (like "chilling" with the wrong group of kids OR not following through on hmwk or blowing off his tutor) then he is the one who has to deal with it.  I have to keep reminding myself of that.  Generally, he is doing quite well - and I am grateful for that.  I am.