I had back surgery on Wednesday and my pulse has been low 50 and lower into the 30scrate is this something I should be seen for?

We can't know - many medications bring BP and pulse down (plus we don't know if you aren't missing a few beats). If you aren't dizzy and faint, then I wouldn't worry, but you can certainly call your personal physician or even the surgeon's office, rather than dragging yourself to the ER in person.