A sudden jump from your usual flow to a much heavier, thicker one, together with being sexually active 10 days back, means this could be more than a normal period. A very early
pregnancy test can still come back unclear, so it doesn't rule this out on its own.
Next Steps
Take a home
pregnancy test now if you haven't already, and see a gynaecologist soon so they can examine you and check for a miscarriage or another cause behind this heavier bleeding. Please don't start any medicine on your own for it.
Health Tips
Go in urgently if you soak a pad within an hour, feel dizzy or faint, or get severe one-sided pain.