CD 15 : Nipple Pain & Cramps?

It is my predicted day of ovulation, I do not chart anything except for when my periods happen bc I am trying to not make ttc so stressful and let it happen when it happens. Today I am noticing a lot of cramping, gas pains, bloating, and my nipples are SO tender. This has not ever happened mid cycle, mainly the nipple pain. Is this from ovulations? What do you guys think?