Hello,
Vaginal dryness can be due to low estrogen levels - seen during menopause, stopping birth control medications, having a baby, or as a side effect of certain medications. Also, high levels of stress can cause vaginal dryness. Cigarette smoking can also cause vaginal dryness. Rarely medical conditions like sjogrens syndrome can cause these symptoms.
Indulge in plenty of foreplay before intercourse or use water based lubricants like KY jelly. If the dryness persists then get evaluated for these medical conditions.
It is very difficult to precisely 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 and please do keep me posted on how you are doing.
I notice when I drink a lot of water my vaginal area stays very moist and vice versa.