Sharp pain?

My period is due in 3 days and i just had a very sharp pain in my uterus area that lasted for a few minutes. Even afterwards i had a dull ache towards the left side of my uterus, like i feel like i could point it out if i had to. It no longer hurts but i was wondering what does implantation feel like? With my firstborn, i never experienced any sort of pain like implantation so i was wondering if this is a possibility or not?