my cornsnake isn’t pooping

so i’ve had this 5-6 month old corn snake since september, he eats 1 a week a pinkie and he has NOT pooped since i’ve got him. at the start of November i brought him to the vet, and he said nothing wrong, but i still feel like it’s not right. he doesn’t have any hard spots or anything and seems to be normal in behaviour, but my other snakes go more regularly do i take him to another vet? or i should let time do its thing? sorry for any errors, not my first language thank you for any comment