Swallowing precum any women get pregnant?

No possibility at all. Same for semen. Even vaginal exposure to pre-ejaculate fluid is near zero risk for pregnancy, despite internet buzz to the contrary. Pregnancy almost never occurs without ejaculation in the vagina. Pre-ejaculate fluid and conception is mostly an urban myth.

Pregnancy is not possible in above circumstances. Contraception remains otherwise key in avoiding undesired pregnancy and associated anxiety and when intercourse is likely to occur.

Pregnancy occurs when semen is deposited inside the vagina and not the mouth. Besides precum has no sperms- so no chance