Does anyone know

Hi all I have a question.. I have been quite strange lately. I am an endless bundle of energy and am really,quit smoking now, really happy,quit smoking, excited and I seem to be laughing all the time. Its almost as if I am high (not that I know what thats like because I NEVER INHALED).Tomorrow will be 7 weeks for me and someone I know who quit 4 years ago said the way that I am acting is because my brain is getting more oxygen. She said that it happened to her around 6 weeks.Has anyone ever heard of this or experienced this??? Not that I am complaining...after weeks of feeling so blue this is kinda neat. Just wondering ..Anyways I am feeling really really good and wishing I could share this feeling with everyone....Barb