Susan gripped the sides of the porcelain vanity sink and tried to control the terror raging inside her. She slowly counted as she breathed in through her nose, out through her mouth. After five counts, she slowly (slowly/slowly--lose one) looked forward to see herself in the mirror. She saw despair. Despair is something I can work with, she thought, but not terror. She gazed into her own hazel eyes, wanting to see something there to give her hope. (New paragraph) Finally, she put her cooled hands on her cheeks to leech the warmth that had blossomed there. (This part is strong. From here out, it gets weaker.)
She tried to remember what had brought the panic attack on. She had just stepped out of the shower, toweled dry and started to take care of her sandy blonde hair when she saw herself in the steamed mirror. She realized at that moment that she wasn't getting ready for work, but for a date. (delete all this) This was her first one (date) since she had moved to this town six months ago. Then she downed a cocktail of self-doubt, self-pity and insecurity, which left her in a state ripe for panic. (needs transition) Had she known how the night would end, the horror would have utterly consumed her. (strong ending to this, but it needs a smoother transition)
Critique: The first description of her looking in the mirror is one of the few instances where that convention works. The rule is: never have your character look in a mirror as an excuse to describe their physical appearance. But this works--until you start actually describing her normal physical appearance.
Would I ask for more? Depends on the strength of query and synopsis. Based on this, probably not until after rewrites. But then I'd be willing to look at it again.