Hi John, welcome to Pherotalk! 
Well, its good you had luck with TUTH - For an 18yr old, that can be a hit or miss thing due to its none content, which can often be too much when combined with your own production. Generally, younger = more/older = less.
However, a more sexually charged place like a club is the sort of place where it can work with strangers. Wearing it to work/college or in more sedate places can come-off a bit too horny though.
So have a good look through the other products here and you will find a whole lot that are suitable for all sorts of situations and can help inspire all sorts of attraction-building feelings. eg
Ammo - A classic well rounded social/sexy masculine mix that has the same amount of none as TUTH but is balanced by the other main pheros, nol and rone, in a way that makes it suitable for work and less charged socialising.
Instant Shine - A happy/feelgood phero that makes you good to be around.
IO - Helps promote flowing conversation.
IH - Helps promote closeness and bonding.
IG - A light suave/status mix that suits guys your age very well.
Have a read of this thread - it contains all the basic info you need to get choosing and using pheros effectively:
Hope to hear more good results from you soon