Referring to the data you provided, it seems that you might be experiencing vaginal dryness due to the lack of lubricating mechanisms. The cause could be hormonal (estrogens) deficiency or their decreased levels. Also, it might be due to vaginal douching, lowered function of thyroid gland (hypothyroidism), vaginal yeast (candidiasis), other vaginal infection (vulvovaginitis), certain groups of medications (like antidepressants, etc.), certain skin conditions, cigarettes smoking or simply altered function as well as an infection of Bartholini’s glands (responsible for vaginal lubrication).

Occasional vaginal dryness during intercourse may mean that you aren't sufficiently aroused. Take a longer time to be intimate with your partner and allow your body to become adequately aroused and lubricated. It may also help to talk with your partner about what feels good. Having intercourse regularly (on a daily basis) may help promote better vaginal lubrication. (Though you may be willing to try just about anything to relieve your discomfort, avoid using the following products to treat vaginal dryness, because they may irritate your vagina: vinegar, yogurt or other douches and gels, hand lotions, soaps, bubble baths,…).

For starters, it would be helpful if you use commercial water-based lubricants and moisturizers (oil-based ones might damage the condom). Certain of these lubricants go in the same package as the condoms, or you can separately buy an additional bottle of these.

However, it might be wise to visit your obgyn for further diagnostic procedures in order to precisely diagnose the exact cause of vaginal dryness in your case and, furthermore, to prescribe an appropriate treatment, if necessary.