I had gastritis in my second two pregnancies. It was in the exact spot you describe and felt like my stomach was being twisted in knots. It was excruciating. It got so bad during DS1's pregnancy I ended up in hospital on morphine for the pain.

DS2 's pregnancy I started getting it again but resolved it completely by about 15 weeks using a low GI diet and probiotics. Worth getting it checked out anyway but give the diet and probiotics (I used a pregnancy and breastfeeding specific one - PM if you want details) a go - they're both going to benefit you and bub regardless!