Severe Pain During Intercourse. Suggestions?

Hi, I recently mutually discussed about sex with my partner and we were both ready. The first time I tried she was in too much pain when we tried to have (protected) intercourse. However we lost the libido as I kept trying to insert my penis but it just would not go in. Tried very slowly and moderately slow as well but no luck.
She was in too much pain so we stopped. Decided maybe she wasn't aroused enough and we let It go.
A few days back we tried again. A Lot of foreplay and passion was involved and I slipped on a condom and tried again. This time I tried a lil' harder and she was almost in tears. I got scared so I just calmed her down and let it go again.. now I'm thinking whether it's my problem or hers.
And if it's hers, please tell me what I should do the next time I try to penetrate her.
Kindly, help me on this matter.
I know pain will be experienced, but is so much pain present when my glans is only inside and the rest is still obstructed from entry.