It is interesting that you mention that your new GF has dentures.  Sometimes persons with dentures can be colonized with Candida, the fungus that causes thrush and they sometimes experience the problem themselves.  This of course, should not be a reason to stop an otherwise healthy relationship.  If you have doubts about this person's past, let me suggest that it might be good for both you and your new partner to go (together if at all possible) to go for a sexual health check which includes screening for STIs.  This is not an accusation but simply acknowledgement that both of you appear to have had other partners in the past, that many STIs can occur without symptoms, and that while it is unlikely that either of you are infected, knowing this based on mutually negative tests will provide a measure of confidence and trust as your relationship moves forward.  We routinely recommend this for new relationships and suggest that such testing should include testing for gonorrhea, chlamydia and for the woman and sometimes the man, depending on the test performed, tests for trichamonas using either vaginal swabs of for the male a urine test.  Testing for HIV and syphilis, while far, far less likely can be easily added with a blood test if desired.  We specifically recommend against blood tests for herpes unless one partner has a history of the infection as they have relatively frequent false positive test results and can be misleading. In the US confidential testing can be obtained for little cost at health departments.

As you know, this is my 3rd response.  thus, as per forum guidelines, this thread will now be closed.  Let me further warn you that should you post further, anxiety-related, repetitve questions, the question may be closed without a response.  This is done as there is little value to you or others from the repetition.  Please continue to work with your counselors on your recovery from your PTSD.  Take care and best wished.  EWH