WelFare Resources in Oxford
Student Minds also has an Oxford branch. They have a campaign, and a peer support group. Both can be reached via email@example.com
The main Student Mind site has a page for LGBTQ+ issues: coming out, gender transitionaing, supporting a friend, discrimination, exclusion, and further resources.
Most colleges have some sort of nurse (perhaps shared with other colleges) who is usually around most days during the week who can be a first point of contact for questions. They are generally quite quick and easy to contact but may not have the right information to help you out with specific LGBTQ+ health-related issues.
Generally regarded as lovely people, and easy to make an appointment with. Don’t be put off by the formal name, there really is no problem too small to see them. We have mixed reports as to their knowledge of LGBTQ+ issues.