Is it Abnormal to lose erection when losing virginity?

I wouldn't say it is abnormal, rather this is common when males lose their virginity. This is a classic sign of performance anxiety.

You need to relax. The anxiety of first-time sex and hoping you will do it right and she won't hate it....this can play with your head and cause both erectile issues and premature ejaculation.

Once you relax, everything will work fine. If however, you still find yourself getting too anxious, do more foreplay. Another trick that takes the edge off is to masturbate.