I used to have that fear too. You just have to realize that if you do make a fool of yourself, the likelihood of ever seeing that same woman ever again is close to none! (Unless you live in a tiny town) Once I really took that to heart, I became a lot less concerned about what women that I met thought of me and much more confident when talking to them.
I don’t have any more suggestions in terms of what pheromones you should try, but you might want to give these a read before you actually start using them:
(1)How to Find Your Sweet Spot
(2)Snooks Big Book of Pheros for Rookies
(3)Muskcloud’s Phero Color Chart