Baby stomachache

Is this normal? My 11 week old baby will cry uncontrollably when trying to poo or fart these days. She will strain and stretch her body to fart when sleeping and will wake up from her sleep crying. She is exclusively breastfed. I have put ru yi oil on her tummy and did “bicycle” exercises but it doesn’t seem to work. She is pooing every 2 days and it’s always a poonami.