With that said we can look at the verse quoted with just a little bit of common sense. Do we not have harem girls wearing sheer silk pants or dresses dating to the time of Jesus Christ? Would a man wear a sheer (see through) silk pair of pants to go out and dig in his field? No, I don't think so. Do we know what Mary wore under her robe? If women are not to wear any pants then what kind of underwear does your preacher say they should wear? I know I am getting ridiculous but the idea that God is trying to get across is that men should be masculine and women should be feminine.
There should be none of this transvestite stuff of cross dressing as this is an abomination that God hates. He gave each of the genders their characteristics and it was VERY GOOD when he created them (Genesis 1:31). Why is it so difficult to maintain those beautiful characteristics as He made them? When we try to be any different we are in effect telling God he did not know what he was doing when he separated the genders in the way he did.
I wear nice looking slacks and pant suits when out in public and find them to be not only feminine and attractive but more modest than the sometimes quite short skirts that some women wear. I am an older, retired woman and comfort is more important than what others might think. When I am home alone I get out the even more comfortable sweat pants and T-shirts. So if a woman is never to wear pants (by the way this was how I was brought up) then I am sure to go to the lake of fire and vanish, but my God is most merciful.
I hope this helps to make you feel less guilty in what you wear and what you don't. You are free to wear dresses, slacks or any combination thereof. As a note of caution though, when attending church where your preacher would take note of your attire (and to avoid embarrassment, his or yours) you may wish to wear clothes that would be considered acceptable. I am always reminded of the verse in 1Corinthians 10:23 in any of these matters:
"All things are lawful for me, but not all things are helpful; all things are lawful for me, but not all things edify." (1Corinthians 10:23)
Even if you feel comfortable in a nice looking pantsuit or pair of slacks and lovely blouse to match it (definitely not meant for men to wear) it might not be edifying to flaunt it in this environment. There are many things with which we might have to hold ourselves in check until God teaches the other men and women the same lesson.