If you want to do something, follow your instinct and do it while you still can!! Regret for something you did not do is the WORST type. Uncertainty and doubt can haunt for a lifetime, lowering self-esteem and worth, and is so easy to avoid by just being yourself. Don't get stuck wondering "what if..."
Let your individuality shine by consciously choosing how to behave, react, and live each new day. Never cheat yourself out of being you.
Every choice you make should reflect who you are. If negative or undesired result, it's still better to experience the bad in all its glory than to forever idolize what "might have been..." Be true to yourself.
If you regret something you did, learn from it. Humans make mistakes. Give yourself slack. Remember: you can only change the future--never the past.
DON'T regret your actions. For better or worse, they celebrate your unique existance! Be yourself, trust your choices, and don't look back. You're worth it!