 [ Symptoms ] can you get chlamydia just from switching from anal sex to vaginal sex  i have a friend who had been previously tested for any stds and was negative then after she had sex with one guy during sex she had anal sex and then went back to vaginal sex she had chlamydia her doctor said that the switching from anal to vaginal could possibly give her the chlamydia is that true i have also been told that you can contract all sorts of things from switching and just wanted to do my own research [ Disease ] you may be having a endocrine disorder causing the deranged levels of the above investigations pituitary gland disturbances can be the cause needs to be analysed by a endocrinologist