With only brief external contact and no ejaculation, pregnancy risk from that encounter was already low, and the emergency pill taken soon after lowers it further. The bleeding that followed about a week later, with clots and cramps, is most likely a withdrawal bleed from the pill itself. But whenever bleeding and cramps follow an emergency pill like this, a doctor needs to rule out miscarriage and ectopic pregnancy before putting it down to hormones alone.
Next Steps
Keep repeating the
pregnancy test, since an early negative doesn't fully rule either of those out if a normal period still hasn't followed. Please see a gynaecologist for a quick in-person check if there's any doubt.
Health Tips
Go in urgently for fainting, dizziness, one-sided pain, heavy bleeding, or fever, since those need same-day attention.