I too have this personnel experience before and believe me when
you were sexually turn on, you don't want to DIY. For my cases was
i've been trying to enter her at the wrong sides, didn't really
know it till i used a torchlight =X. Secondly it was too dark thus
the torchlight. Thirdly cause my girl was too tensed *probably the
same case* i've tried using lavender a type of flower with very
pleasant scents very smoothing though. Fourth i've made her wet by
licking her clit with a gentle tongue. And inbetween try fingering
abit.
I do hope my advise do help, if they really don't 0.0 well get a
doc.
If you do get pass her try going slow and when you have reach her
hymen that you have to ram it =P.