Tooth and Mouth Problems

I am 20years old girl. Dentist will replace my porcelain crown with zirconia on front teeth in 3-4 sittings. In between how I can go college as it is in front zone? Does temporary crown look natural? Isn't it look unnatural or very bad while smiling.?I am very tensed. Please help me.

I've had ulcer like patches all over my tongue for about 6months+, sometimes it can be really sore and painful. I don't drinks fizzy drinks or many hot drinks. I mainly drink water and I've tried changing water bottles and drinking from just new bottles every time. I don't eat many aciddy foods. I have no idea what it could be, I used to wear retainers but stopped wearing them as thought mayb it was them but hasn't changed anything? I don't often go to my GP as I get embarrassed easily.

I diagnose with true generalise macrodontia in which tooth becomes very large than normal and my tooth also very large and my all lower left and right lower molar which includes first second and third molar compressing my inferior alveolar nerve canal revealed in cbct properly and my dentist had said for the all six tooth extraction of mandible arch for my treatment and get a flexible dentures on both sides and implant later as to relief my strange symptoms of pain and sensation tingling type

I have been brushing twice a day and used to clean tongue, but the plaque in the tongue is not getting reduced. What might be the cause? What can be done to clean it?

Having sensitivity in teeths &  What could be the solution please? Root canal is the only option or if anything else?

Had 2 rounds of cleaning after Gingivitis detection. Still having daily bleeding of gums after 2 weeks of being treated. Although most Swelling is gone.The bleeding happens only at night for some reason. Is this normal? Possible reasons? How much time does it take to reverse this? Should I visit my doctor again?

Why my gums are getting black. I am regularly brushing my teeth twice. Please advice what's the cause.

My first and second lower molar are extremely large tooth which is compressing my inferior alveolar nerve canal in both left and right side diagnose in cbct as I experienced strange tingling ,creeping,jolting,stabbing,current type sensations and mild pain from the area of my lower first and second molar in both sides but left side sensation is prominent than right side as my dentist had said extraction of all the four molars on both side to relief my symptoms and get flexible denture.what to

What is the standard price of root canal, if both jaws are needed to be covered, as well as for tooth filling?

The gums at the rear of my lower 2nd molars have been detached from the teeth, for the upcoming 3rd molar I think, which is giving me a good amount of pain, especially while eating and drinking. 1.After how many days of pain should I consult a dentist? 2.What can I do to reduce the pain?