??
So expressing my ignorance here... you are PHS, right? Do you wear a separate uniform or "Navy" uniforms (basing this question only on the PHS website that looks like all Navy uniforms)? I'll answer based on the Navy uniform version - I can't help you if is something totally different! (Of course, I may not be all that much help either way!
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Navy has women's and men's specific tailoring for pants - with a significant differences in hip widths and reversed button/zip on both the pants and the tops. I doubt anyone would really notice if you wore men's pants, though you'd have to wear the men's shirt too so that your "gig" line matches up... women's belts are smaller too.... so while you could probably make it work, I'm not sure there is much point.
That being said, you can ABSOLUTELY wear the men's garrison cover. I mention that because those "banana" covers that women are supposed to wear are AWFUL and as soon as the message came out letting us wear the men's style, I tossed all my old bananas and did a little dance. I HATED those things!