After a day of period pains had period sun night til tue pm. had no period from tue 18:00 - wed 13:00. on wed 12:00 had severe period pains, took 2 nurofen for period at 12:30. by 13:00-13:30 had very heavy bleeding. is this normal?

Doctor can evaluate: Many women have occasional variation of their mucus discharge, some spotting between periods, a heavier period, a lighter period, or even a missed period. Having one or two of these symptoms doesn’t necessarily mean there is a medical problem, but "severe" period pains and "very heavy" bleeding is not normal, so a visit to one’s primary care or Ob-Gyn doctor is a good idea.