Size doesn't matter - bum, boobs or bits. Explore your sexuality when you are ready - not when your friends tell you they are. Talk to other teenagers - no matter how cool they look they will be feeling like you are. Keeping clean is part of the answer - a daily wash or shower is worth all the perfume in the world. Periods are at worse a nuisance, at best a sign that you are a healthy adult.
Wet dreams are nothing to be ashamed of either.
Zits can be treated - and they will go away in the end. The BBC is not liable for the contents of any external internet sites listed, nor does it endorse any commercial product or service mentioned or advised on any of the sites. Always consult your own GP if you're in any way concerned about your health.