Living4God,
I would answer your question as a hesitant "yes" God does continue to speak to people today. Here's another way to look at the conflict here as I see it:
I don't believe it's either biblical or consistant with Church tradition for one to be "slain in the Spirit," My father, who is a Pentacostal pastor, believes very much that one can be slain. My mother has had very personal and endearing experiences where she claims she was slain in the spirit. So there is a perpetual conflict in me between what can be proven by theological precident and compelling subjective experiences. This conflict in me will likely never be resolved this side of heaven because I take theology very seriously, and just as seriously I treasure the personal experiences of those I love.
Now back to your situation. The-Highway board has developed the opinion that neither the gifts of the Spirit nor revelation continued past the Apostolic age. They developed this opinion based on a very imposing body of evidence to support such an argument and I respect their opinion, but I disagree...mostly because of very personal experiences where God has spoken to me as He has to you.
I would say though that the Highway's opinion does a valuable service as a restraining influence. The days of Joseph Smith and the formation of the LDS church are a good example of the danger of numerous claims of new revelation. Even today, Mormons believe in ongoing and multiple revelations, much to their theological delinquency. The reason that I say the Highway's stance is a valuable restraining force is because although I believe God still speaks to us today, He isn't loquacious. That is to say, these revelations aren't happening all that often.
Martin Luther also espouses the danger of multiple private revelations:
"There are almost as many sects and beliefs as there are heads; this one will not admit Baptism; that one rejects the Sacrament of the altar; another places another world between the present one and the day of judgment; some teach that Jesus Christ is not God. There is not an individual, however clownish he may be, who does not claim to be inspired by the Holy Ghost, and who does not put forth as prophecies his ravings and dreams."
The danger, I believe, in being dogmatic about denying continuing revelation is that in doing this God is bound by human edicts. The Holy Spirit is described by Jesus as being like the wind, "it blows where it wishes." In my mind, I cannot be absolutely certain that being slain in the spirit is impossible because I cannot justly place that limitation on the Holy Spirit. By the same token, I could not discount your personal experiences either and am forced to accept them at face value. I would simply caution that anything you feel God has spoken to you ought to line up with His character as revealed by Sacred Scripture and Sacred Tradition.
There is a Catholic response. Take it for what you will.