Hello Good Evening,Pre-ejaculate
or pre-cum is the clear, colorless, viscous fluid that emits from the urethra
of the human penis during sexual arousal.
It is similar in composition to semen but has some significant chemical differences. The fluid has found no or low levels of sperm.
Pre-cum is believed to function as a lubricant and an acid neutralizer. The amount of pre-cum emitted varies widely between individuals; some men emit none.
The vagina is normally acidic, so the deposit of pre-cum before the emission of semen may change the vaginal environment to promote sperm survival.
There are nothing to worry, nil chances of getting pregnant through the clothes.
Fertilization can not be possible through clothes, or without any penetration or actual intercourse.Pregnancy
depends on directly proper ejaculation of semen in the vagina by intercourse and during fertile period of woman.
But in your case pre-cum rubbed only on clothes, not inside the vagina, so very rare chances to get pregnant even if you were in fertile period, so be relaxed and wait for period to come.
Dr. Naresh Jain