Tooth and Mouth Problems

I'd RCT done on my molar teeth (bottom right) almost 6 years ago and everything was fine. But for last 2 days I am feeling severe pain whenever upper tooth touches the lower molar tooth.

I noticed that I have developed some white coating on my tongue and it has been here since the 2nd of February. It's the 6th of February today and it's still there. Which type of doctor should I go to get a diagnosis.

Can I please know the right way to floss? How often is flossing recommended? Do people with braces need to floss more? If I have gaps in my teeth, do I need to floss? Will flossing harm my gums (it sometimes bleeds when I floss)?

I was having a bad tooth ache few days back, and all of a sudden I am unable to open my mouth. I can hardly place single finger in my mouth. I have been to a dentist he said I would need to go through a minor surgery to extract the last tooth, I believe the wisdom tooth. But the surgeon couldn't, coz the mouth opening was not upto the mark. I'm having a hard time eating anything due to this and the pain gets worse daily and the mouth opening is still the same. He has given few medications but still nothing happened. It's almost 3 days now. Any suggestions, of what this is and how to fix this.

Suddenly my gums near the teeth have swollen and I guess they have pus in them. It does not hurt though. Someone told me its scurvy so I am taking vitamin C. Picture attached.

My daughter is 8 months old and has started teething since last 1.5 months. Her tooth is extremely slow and she wakes up every 1 hour during night. This has been really exhausting. I have started calc phos 6x(2 tab 2 times) and bc-21 same dosage. Yet to see results. She it ok to give both of these tablets? Is there an alternate solution? Also, can I mix both these tablets?

Today I doctor did root canal for 80% and they said come after 3 days for another 20% treatment in that 20% will it pain again and root canal done between 2 molor teeth 2 Nd process will it be pain again

Hi, I am having lots of gaps between front teeths, please suggest a treatment to fix this in short time.

I want to fix my teeth in perfect shape it's little distorted. I wants to put bracells on that. Please tell me about fees.

How much time does it take to fill the gap of almost 2-3 mm in between teeth using braces treatment at the age of 27 for a female?