Vaginal discharge that has no smell but its watery thin and white colored that dries in my underwear no period in 3 months while having it no cramps?

Likely: vaginal/cervical mucous, normal, but larger amount. This may reflect an estrogen excess level, from polycystic ovarian syndrome. This can cause the irregular ovulation/cycles as well. Production of larger levels of androgens are converted (peripheral aromatace) to an estrogen (estriol). This can be treated, and should be controlled. Also related to insulin resistance/carbohydrate sensitivity.