Aw mama, 3 days na yan kaya talaga best to check with your OB para malaman kung normal lang yan or kung may something else happening, lalo na if you're on the pill, sometimes may spotting or cramping pa rin kahit protected ka na, but better safe than sorry talaga. A few of us mums nag-experience din ng ganyang cramps kahit walang period, kaya hindi ka nag-iisa, pero honestly pag ganyan matagal better have it checked na lang para matulog ka ng mahimbing at hindi ka mag-worry.