Do you need lube for your first time?

I'm going to be losing my virginity this weekend, and this may be stupid, but is lube highly recommended? I know you don't NEED it but I'm scared I won't get wet enough or something because I'm nervous :( I also feel awkward buying lube and don't really know how I could get some because my parents see my card purchases online sooooo..... (I'm 17 almost 18)