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The first day my period has ended, and about 2-3 days before my fertile window began, and about a week before my offical ovulation day, my boyfriend and I saw each other. My cycles have been a tad off lately, but are always 28-30 days long. Anyway, when we saw each other, we did not have sex. We don't have it in the first place, one time his tip went in a tad but nothing more. 

Anyhow, when we got together, we grinded nude and he would masterbate and then use that same hand to finger me. I know for a fact there was no sperm; and when he did ejaculate it was no where near my parts, but what I am concerned about is pre-ejaculate. Should I be concerned about it entering me through his fingers, or touching my vaginal opening? During this time in my cycle, and with it being only precum, do I have anything to be concerned about? I can't take this anymore..please help.