Don't worry milo, this is a common symptom felt during a bout of Cup Fever. It's a feeling that commonly y follows an outstanding semi.
In time, the stomach butterflies and sweats will return along with insomnia and the childlike 'how many sleeps to the big day?"
I would leave it for few days, then have a day out in the big toon. Alchohol to be taken, with friends, as and when required.