hi.i am 18 years old.i have a loving boy friend who could do anything for me.we never tried having sex with each other although we tried all other forms of lovemaking.but a few days back when it was my 7th day after my first day of periods,we were so high that we just inserted his organ inside mine.but we just did not massage or do anything and just pulled it off in some seconds.but since it is the first time for me i am scared about pregnancy.are there any chances of pregnancy??i am really not prepared for it.