Can i take advil cold and sinus (night) and nasonex (mometasone) for a cold and sinus pains while taking azythromycin for a sinus infection?

Yes: That combo is OK to take together. In fact, it is a good combo for a sinus infection. Just watch for potential side effects from the Sudafed in the Advil Cold & Sinus. It can be stimulating and raise BP or cause insomnia. And some men get prostate side effects and find it more difficult to urinate. If you get those side effects then change to just regular Advil or Aleve (naproxen).

They do interact: very slightly. since azithromycin when being eliminated by the liver does prevent these other drugs from being removed as fast. BUT, the small effect on the drug metabolism isn't going to be noticeable let alone being in any way dangerous/risky. Nasonex (mometasone) especially once it gets out of the nose is so low an amount in the body, that it can't ... well.... do anything outside of the nose/throat.