Harley and others have covered a lot of ground, and I am just wondering as to your general ability to reason. Two examples:

1) You posted a long message about issues related to sex. And then at the end you wondered if you had a sex-related problem worth mentioning on the intake form. You also wondered if it is worth talking to a therapist. Well, if you have material that you feel is worth mentioning on a forum, it follows that those issues are important enough for you so you should indeed mention them to your future therapist. What else would you talk about with the therapist - the weather?

2) Harley mentioned that self-esteem is not confined to being satisfied with your appearance. This is a good observation, but you could have gotten there yourself. You are pretty and you know it, but you do not expect people to like you - that is enough to conclude that something is amiss, self-esteem-wise, because a confident and happy girl who is pretty, open-minded, interested in and respectful of people will be liked by a fair number of folks (nobody is liked by every person she encounters). And she should know it, right?

Someone noticed that you are putting too much importance on the # of partners and not on the quality of your experience, because it is the low quality of your sex life that is troubling. You did very well for yourself by posting as the responses covered everything including sti testing, but I would, in addition, review your reasoning skills to see why those blindspots occur to you (why you do not see obvious issues).

Good luck with that therapist -I hope you get a good one!