Burning pain under left rib during 34 week pregnant?

Irritation: There are no organs that could be harmed or causing damage under your left rib during pregnant, so this pain is likely a stretching or irritation of the uterus or diaphram. At 34 weeks, your baby is likely head down and often a foot, elbow or buttock from the baby can cause pain at the top of the uterus around this time. Likely just a normal irritation of pregnancy.