Uy, I know it's scary to see anything like that, pero please message your OB or go to the clinic para ma-check agad, better safe than sorry, lalo na may bleeding after sex kahit konti lang. Marami kasing reasons why it happens (from cervical sensitivity to other things), pero seryoso, doc lang ang makakapagsabi ng tama at magbibigay ng peace of mind mo. Wag kang mag-alala mag-overthink muna, punta nalang doctor, okay? Keep your hubby in the loop din, and no more activity until you've been cleared. Praying it's nothing serious!