Hello BestSelection: Thank you for bringing your concern here to PC. I see this is your first post. So... welcome to Psych Central.

I'm not familiar with these gender swap stories you've referred to. However, as a person who has struggled with his gender identity his entire life, I have to tell you I think you'd know if you were transgender. I'm not a mental health professional. So I can't tell you, with any authority, what this is all about. However my suspicion is it may have to do mostly with anxiety.

You mentioned questioning everything in your life & wondered if that might be a symptom of OCD. I can't tell you that. (Perhaps other members will have some insights into this they can share.) However here's a link to an article, from Psych Central's archives, on the subject of OCD. The article provides links to a number of additional articles on the subject including a link to PC's OCD quiz:

Obsessive-Compulsive Disorder (OCD) | Psych Central

Also here's a link to an "Ask the Therapist" column, from PC's archives. The person who wrote the letter is a 14 year old girl. So the details are different. But I think the therapist's response is apropos:

Fear of Possibly Becoming/Wanting to Be Transgender - Ask the Therapist

Anyway... I hope you find PC to be of benefit. From my perspective, I believe you can rest assured... you're not transgender.