Tmi: tampon, anal, male arousal/pre-cum, light period bleeding, fertil window 5-6 days away.

Period day 5, light bleeding. Fertil window in 5-6 days. 
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So still bleeding. I put in a tampon. Tried anal. My SO had arousal fluid on penis head. He DIDN'T cum. He went pee after ejaculation night before. Should I worry about the Pre-cum/arousal fluid like absorbing from tampon string or somhow absourbing into tampon? I know it sounds stupid, but can that even happen?

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