Hello young man and welcome.
First of all,
oral sex cannot cause conception if this is what you and your partner are worried about. The next thing is that her symptoms are associated with a
hormonal influence and has nothing to do with any sexually transmitted infections or conception/
pregnancy.
First of all, if you can, please get her to write to me using our premium service as I need to discuss a few things with her and can also prescribe medications that can help her see her period.
In the meantime, check with her on factors like
stress, medications, infections, weight gain or sudden
weight loss, contraceptives, birth control pills, emergency contraceptive pills, etc; which are all factors that can cause the hormonal imbalance she is experiencing. It should all subside in due time in my opinion, and there should be nothing to worry about. Make sure you both concentrate on your careers, and do not make any mistakes sexually that can change that.
Best wishes.