I really think that having been married such an extremely SHORT time, and presumably having been long chaste before this effort, the recommendations to see a doctor and to “lube” are *extremely premature, *particularly if there is any chance she has ANY anxiety about not being able to “perform” well and fast enough - which is suggested by her concerns within a week of her wedding.
Weddings are stressful, and so can a honeymoon be, with the travel after all the excitement, and add then add to that the idea that you are supposed to feel a certain way and your body is supposed to respond in this new way* immediately* and then the concern to that she hasn’t done/can’t do the right thing and that her poor performance has stressed her new husband, when she instead wants to please him - all these things can produce tension, and things tighten up when you are tense, and one needs to be relaxed and happy for things to go in the normal way. I have even had trouble in the past with menstruation paraphernalia when I was tense. So unless the OP feels she is completely relaxed and unworried already, she should give it some time. Like two or three months, not weeks, before she runs to the doctor. A trip to the gynecologist for most of us is not a walk in the park. That should be only when one has given the normal way an effort and still feels things aren’t normal. Meanwhile intercourse of course should not be forced when its painful, because that only produces more tension all around. Just spend time being together in a relaxed way, getting to know each other physically. Relax, and pray that God show you the way, then *let it go *and *trust Him *to make it happen, or tell you if there is cause for real concern.
And I do not like the lube idea - its too soon for a healthy young girl. God created us with our own lube, and for the vast vast majority of women in a relaxed and happy state with her husband that she loves and trust, this works perfectly fine. So give it time for the natural way to kick in, the way God designed it. No products. This is best. Why start out with a habit of using unnatural means when its far more likely that your body is in perfect working order? Goodness, its only been a week!