My ebf 4 mnth old is fussy at the breast the last few days. She had a large poop 3 days ago she has been straining pushing crying tensing her tummy and legs for the last 2 days. Usually if I help with a thermometer and Vaseline she goes right away but this time it doesn't help except this morning she had a small poop which was alot thicker then normal.. But shes straining still and seems to need a lot of force to pass gas even.. I'm considering a suppository but not sure. Any suggestions?