Welcome! This is an online support group for anyone who is very afraid of dentistry or who suffers with dental phobia. Please note that this is NOT a general dental forum! You can find a list of them here.
You've got some heavy calculus (tartar) deposits. Once they've been cleaned off then your gums should be fine.
You need some tuition on cleaning in that area which hopefully your dentist will organise for you.
Congrats on making it through this appointment and getting into the hygenist chair. Often that can be more scary than the dental chair and you did it! Anxiety is SO exhausting.. Hope you can get some rest and do something kind for yourself for making it through!