3 month old baby hasn't 💩 in 5 days?

My 3 month old is exclusively breastfed and hasn't pooped in 5 days? I've done the bicycle legs, tummy rubs, cool boiled water with squeezed orange (as advised by professional), Bath.. Everything!! The last day he had a bowel movement he pooped 3 times. His gas smells Awful. He's not uncomfortable, he's very happy. Should I worry?