Am I about to go in labor

I'm feeling cramps very light like stomach cramps when you get food poisoning or have bad gas colic I'm feeling nausea and chills. I feel like throwing up and I am strained trying to poop but no poop? I feel dizzy should I go to the emergency room I feel sick I'm 30 weeks pregnant

experiencing shortness of breath or difficulty breathing, chest or abdominal pain, sudden dizziness or confusion, severe or persistent nausea decreased fetal movement,