Sharp Stabbing Abdominal Pain in Third Trimester

Patient: I’m 34 weeks 5 days pregnant. Shortly after I woke up this morning I started having sharp stabbing pain in my right side. It’s center right and gets worse when I’m up walking around. It feels better when I lay down and relax. It’s been going on all day now and I’m concerned cause this is my second pregnancy and I have never experienced anything like it before. What could it be?