sharp pain on right side

Vivian
Woke up this morning and when I tried to get out of bed, I got this crippling pain in my right side down by my pelvic area. When I went pee, it only worsened. I laid back down but it hurt to lay on my back. Eventually the pain stopped but I'm really worried about what it could be. I have an app in like 5 days. 
I'm 19wks4days pregnant so I grabbed my Doppler and checked the baby's heartbeat. It was at 144 and I can feel it kicking. So I'm not sure what to do..