cramping with pressure FTM 😰

I've been having constant cramping for about 3 and a half hours now and I had some pressure in my lower belly... I'm only 28+5 days today... I tried calling my doctor but she had left me on hold. I'm kind of freaking out because my baby hasn't been moving much today either. Definitely not 10 times per 2 hours.... I'm wondering if I should go to the ER...?