hi kimio77,

they always said if you pay peanut then you get monkey. needless to say, it is important to visit a good dentist which charge affordable but not cheap. the charges will really depend on the severity of your gum (gusi) condition. i believe you are experiencing severe inflammation, redness and bleeding when you brush your teeth by now. that caused by debris, plaque, calculus, tartar which contain multiple types of bacteria colonizing your gum. to cure it? well, you have to remove all the factors which cause your gum infection. most likely you are having chronic gingivits (google it),it might worsen to chronic periodontitis (google it).
hope you recover soon.

dr k.

Sorry for neglecting this thread, im back for more doubt...so guys, throw in more question!

For the sharp edges, maybe you should go back and ask the dentist to adjust it for you so you feel more comfortable.
For oradex it is safe, just that it will cause staining due to Chlorhexidine ingredient. But the staining only visible if you use it quite often, i would suggest you to use oradex and others which are non-chlorhexidine. Oradex you can use maybe twice a month, then normal day use the other mouthrinse. Since you havig gum problem, it is bet to use with oradex.
To make it white, first is diet. Reduce consumption food like coffee and tea. Next is stop smoking if  you are a smoker. Get regular scaling and polishing. Im not too sure about those whitening toothpaste in the product, but you can try it out. The last will bleaching, but the bleaching effect only temporary, last maybe up to a year then the color will return back to yellowish.

If you gusi have a small hole, we call it black triangle. It simply means you bone reduced in height and gum collapse. This is due to tartar/calcalus collection around your teeth for a long time, resulting in bacteria invading into your gum, causing you to have such problem.