Ph balance during TTC fertile week

Hey ladies... how did you retain you ph balance when BD several times in one week? I lay down for 20 min and clean up after but no fem wash or anything at all in fear of messing/ hurting the process but after say three days of straight BD I have a very slight tmi smell. Nothing else at all but I worry his ph messes with my ph because that is the one time this occurs. Anyone else have this????