I am going to be painfully truthful with you. You are very young and in college. You will always get an eyebrow or a funny vibe at first, but if you can play, that goes away the minute "those dirty men" hear you. If you can play the horn, you will get the respect....maybe not as readily as your male counterparts and maybe not as openly, but you will FEEL and KNOW you have the respect from your colleagues. Once you have that, you will be wishing they sometimes remembered you were female! So, just accept that initial vibe thing, it will never go away because all trumpet players size each other up - its not solely because you are female. The only other obstacle right now, since you are in school, is your true trumpet ability. Trust me, it only gets 1000 times harder once you are out of school and want a job that many others want. All stops are out and you can't whine. You have to compete at the same level or forget it.