Thanks for writing to HCM
Thick white discharge is not related to pregnancy
Your problem is due to infection,most probably due to candida(fungus).
You need proper clinical examination and investigations.
Besides local hygiene,I suggest my patients to take tablet clotrimazeole 100 mg for vaginal use.It should be inserted deep in the vagina at night during bed time.
It should be used for six consecutive nights.
You should also consult your gynecologist for detail evaluation.
Get well soon.
Hope I have answered your question.