ᗪIᔕᑕᕼᗩᖇGE

Just wondering if anyone on this group can answer my question me and my husband had intercourse last night and he cum inside and the next day I was at work and all sudden I felt a big drop of liquid from my vigina like his cum all come out :-( yuck went to bathroom and it was like brown my menstrual was over 4 days ago.. Does anyone had this experience before thanks in advance for any advice :-)