Google closed yesterday at $100.33 and opened today at $101.48 and climbed to about $105 before 10:00 am and then settled down to around opening levels.
Plenty of people sold their google shares yesterday pocketing thousands of dollars in a one day gain of 18%. Those who held onto their shares are glad they did right now as google is currently trading up 7.64% at 108.16.
Don't be sad - being a fool is not doing simple and logical things that Google's founders did, or Intels for that matter, or Microsoft's - missing speculative opportunity has nothing to do with foolishness. Not taking opportunity that your skills permit is.
>>think I am going to sell my remaining shares today.
You may want to consider a stop order at $108. The stock could keep creeping up for a while. You can then raise the order if the stock continues to rise - or you are protected on the down side if it suddenly takes a dump.