Foamy like substance came out after sex last night

So me and my husband were doing the due, and after words TMI* it started leaking out kinda bubbly ( wasn’t straight up foam but I would describe that as the texture)

We used preseed. Lol ( we’ve been using it) the foaming has happened twice lol.

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Has anyone experienced anything like this.

And everything seems healthy down there for both of us**