It is not uncommon for people to have had a few intimate relationships by their late 20s. My guess is that you being a virgin and her having had experience in relationships is at the root of your concern. It is hard to imagine something we have not experienced.
That having been said it is important to note that at this stage of life it is unlikely that you will meet anyone that has not had a past romantic relationship. I would focus on the here and now you have with her. Here is what you have said:
- She has stopped contact with others. This is a very good sign of her intention and commitment.
- She has described her relationships in a way that makes sense – meaning that she was not in love and maintained them because she wanted options.
- Her relationship with you has changed her thoughts and feelings about herself and what she wants.
Taken together this would seem to be a good indication of her commitment and willingness to be a partner with you. Your relationship is new, and this will mean that as you grow together these concerns are likely to take a back seat. Meditation may be an excellent way for you to modulate your feelings and angst about the situation. Over time her commitment to you will dispel these concerns.