Weirded out while shopping

My mother is sick, and I have a play coming up in which I have multiple parts. So I need a unitard. Since mom's sick dad had to take me. I found my size and I tried it on. He kept telling me he wanted to see. I felt so uneasy and I said, "No, I think it looks good." He kept telling me I wanna see, come on out, let me see. I felt so uncomfortable. I kept telling him I was fine without him seeing until eventually I just took it off and put my regular clothes on. We bought it and went home and for some reason I started crying. I felt so uneasy and weirded out. Is that normal or am I just overreacting? What do I do?