Exercise an smoothies made my period regular

It came right at 27 28 days when I'm normally 33 days or above. I'm CD 29 no period I'm constipated an gassy as ever I took test a few days ago Wednesday I think an it was negative. If anybody could Help it would be appreciated also Glow saying I start Sunday even though I put a 28 cycle it's giving me a 30 days period start date.

Symptoms thus far::::::::

Backache

Gassy

Fatigue off an on

Breast sore around the base when touched but nipple isn't at all.

WHAT YOU GUYS THINK?