I was going to suggest using a hand mirror or something similar to check.
If you really want to know, schedule an appointment with your GYN or family doctor for an exam.
Certainly, a cucumber or other object COULD help to tear the hymen, but isn't guarenteed.
The fact that you can experience such penetration with one indicates to me that you probably will have no problem with intercourse.
But your doctor can advise you for certain.