It sounds like you are going through a very difficult and confusing situation, and it's completely understandable to seek validation and clarity. Let's break down the information regarding chlamydia, its transmission, and the implications of your fiancé's claims.

Understanding Chlamydia Transmission:

Chlamydia is a sexually transmitted infection (STI) caused by the bacterium Chlamydia trachomatis. It can be asymptomatic, meaning that many people do not show symptoms, which is why regular testing is important, especially for sexually active individuals.

According to the Centers for Disease Control and Prevention (CDC), chlamydia is typically spread through sexual contact with an infected partner. If you have been in a monogamous relationship with your fiancé for 2.5 years and he has not had any other partners, the likelihood that you contracted the infection from him is significantly higher than the possibility of him having it for years without transmitting it to you.

Possibility of Long-term Infection:

Your fiancé's claim that he might have been infected for years without transmitting it to you is highly improbable. According to medical literature, while it is possible for chlamydia to remain dormant in some individuals, the average incubation period is 1 to 3 weeks. This means that if he had an untreated infection, it would likely have shown symptoms or been transmitted to you much earlier in the relationship.

Furthermore, the CDC states that untreated chlamydia can lead to serious health issues, including pelvic inflammatory disease (PID), which can cause complications in future pregnancies. If he had indeed been infected for that long, it is likely he would have experienced symptoms or health problems related to the infection.

Gaslighting and Trust Issues:

It’s crucial to address the emotional aspect of your situation. Gaslighting is a form of manipulation that makes someone doubt their perceptions or feelings. If your fiancé is insisting that he has been faithful and you are questioning your own reality regarding the infection, it may be a sign of gaslighting. Trust is foundational in a relationship, and it's important to have open and honest communication about health and fidelity.

Seeking Professional Guidance:

Given the complexities of your situation, it might be beneficial to seek counseling or therapy, either individually or as a couple. A professional can help navigate the emotional impact of the diagnosis and the trust issues that have arisen. This can also provide a safe space for both of you to express your feelings and concerns.

Conclusion:

In summary, while it’s theoretically possible for someone to have a dormant chlamydia infection, the circumstances you described strongly suggest that your fiancé has either been unfaithful or was not truthful about his previous infection. It's important to prioritize your health and well-being, both physically and emotionally. You deserve clarity and honesty in your relationship.

If you have further questions or need support, don't hesitate to reach out to healthcare professionals or support groups who can provide additional resources and guidance.