hi frozen,
welcome to the forum!
glad you heard about pheromones and found this place!
Please tell us a little more which aspects of your relationship you want to improve so we can give you accurate information for your needs.
So far i would recommend the following products:
TUTH to spice up things in the bedroom and Instant Honesty for bonding and meaningful conversations - IFM might also help to relax your GF and make her happier in times where she is cranky. If she isn’t cranky in certain times of the months you could use Instant Shine which improves your and her mood.
Please read this post to see which effects are available: Mens Pheromone Guide revised 6/15
have fun here
magnum