Ask for an US?

I'm 14w3d today (due 9/12). We had our 1st US on 3/4, though the only reason we got it was because we opted for 1st trimester screenings. If we wouldn't have opted for those, our 1st US would have been at 20w. We REALLY want to find out the sex of our baby before Easter so we can do a reveal. Is it weird to ask the midwife for an US to find this out? I just feel like I should be able to ask, especially since we were only supposed to get 1 US the ENTIRE pregnancy (which seems weird to me). Thanks!