Taking the i-pill within hours, like you did, is the single most effective step against pregnancy after this kind of contact, and the chance here is already low since there was no penetration. The belly discomfort in the first few days is a common reaction to the hormone dose itself.
Next Steps
A home urine
pregnancy test now would be too early to be reliable, so wait and watch her period over the next 1 to 3 weeks instead; a bleed usually means the pill worked. If it's late, or any pelvic pain returns, see a doctor who can rule out both a continuing pregnancy and an ectopic pregnancy.
Health Tips
See a gynaecologist in person if pain comes back, gets worse, or the period doesn't arrive within 3 weeks.