WHY!?! WHATS WRONG??

I'm sorry to maybe be overreacting or maybe I should just go straight to my doctor with this, but I need advice. I just experienced SHARP pain on my right side. So bad. Almost like a Charlie horse but I know it was cramps! I've never felt this with my first born so I'm worried. Theyve gone away after 2 min. But I'm nervous. My first appt. Is in 2 days. It cant be round ligament pain? I'm to early for that. Help! Any advice? And yes I know I will call my doctor regardless in the a.m. it is currently 9:30 p.m. where I am. So far they seem to have gone...