PMS...Am I dying?!!!! 😱😱

Idk if I'm going crazy or not but am I the only one who experiences PMS symptoms a couple weeks early and feel like some brand new things start happening within my body (stomach pains, IBS symptoms, constipation noticing something new about my body) and seems like I'm overreacting all of a sudden and obsessing about the symptoms? Seriously why can't I stay off of Google looking up symptoms? I feel super sensitive to everything I feel and notice every single change... Is this normal? Should I see someone about this?