This could be vaginismus of, as you say, a hymen issue. It is more likely to be the former than the latter. The only way to sort this out is to be examined by a specialist. This may make you fearful as any penetration is threatening to you. However, a good professional will understand this.
If there is a history of sexual abuse then vaginitis is even more likely the diagnosis. Good luck.
You surely need gynecologist to evaluate your issue.Photo will not give right clue.