Can you advise if I have a deviated septum? (Photos)

Hi there. It's hard to know from what you have shown. However the following may help.
A deviated septum of itself is not a problem unless it leads to physical or functional nose problems. In fact most people have a deviated septum without any issues.
The septum is reasonably large and has both a cartilaginous and bony component. The cartilaginous part is usually the part people are referring to.
If the deviated septum is present along the dorsal or caudal parts it may lead to the nose being visibly twisted or the septum visible in one nostril at rest. Deviations other than this in the body of the septum or along the floor or the part attached to the bony septum don't really matter unless they also obstruct the airway.
The cracking noise usually doesn't mean much and is not uncommon.
So unless your nose is blocked all the time, or looks twisted or the nostrils look very asymmetric, I wouldn't worry. If you are worried then get assesssed by an expert in rhinoplasty. Many nasal breathing problems are only partially contributed to by the septum whether it's deviated or not, and surgery on the septum may not help even if it is deviated.
One final tip. If you are ever going to get your septum operated on by itself, only do that if you are happy with your nasal appearance and your breathing problem is substantially caused by the septum. If you want your nasal appearance changed or your nasal configuration is contributing to your breathing issues, then the septum and the rhinoplasty should be done at the same operation.
I hope this helps.