So that the Community can help you better, we need to know exactly which Canon camera you're using. That, and any other details you'd like to give will help the Community better understand your issue!
If this is a time-sensitive matter, search our knowledge base or contact our US-based technical support team at http://canon.us/SupportCF
Thanks and have a great day!
Usually dust inside of or even on the outside of a lens won't show up. They (dust particles) are OOF (out-of-focus).
You can clean a sensor but I would not suggest it to someone with limited knowledge. This is a good rule to follow, don't put anything smaller than a football inside your ear or camera. If you suspect a dirty or contaminated sensor find a shop or send it to Canon for a C&C. At the very least find some one that has done it successfully before first.
To really complicate this, I went back and took some shots. With every lens I can see the spots, so I have eliminated the lens as the problem. It is funny that when I went back, I can see the spots through the viewfinder also. Possible the mirror and the sensor have been contaminated. Obviously this is a serious problem that I need to resolve, so I think I will look for a qualified shop to clean it.