Hello,
Welcome to the ehealthforum and I am glad to help you out. The possibility of pregnancy is always there whenver there’s unprotected sexual intercourse.
It can be confirmed by doing a serum beta HCG test which is the confirmatory test of pregnancy and is quite a sesitive one.
Regarding your concern about white discharge from vagina and itchy vagina, candidiasis is a likely possibility. Apart from candidiasis one possibility that needs to be evaluated is trichomoniasis.
Candidiasis is caused by the overgrowth of yeast-like fungi called Candida. The characteristic symptom of trichomoniasis infection is a heavy, frothy, fishy-smelling discharge from the vagina.
The infection can also cause discomfort during sex, vaginal itching, pain when passing urine and occasionally stomach pains.
Diagnosis can be confirmed only after pelvic examination and swab samples of the discharge and cervix swabs.
Treatment depends on the same. So please consult a gynecologist and get yourself evaluated. It is very difficult to confirm a diagnosis without examination and investigations and the answer is based on the medical information provided.
For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.