Thanks for sharing your concern.
The reason for sore gums appears to be flu presently.
But it can also be due to mild to moderate gingivitis
developed over a period of time.
Have you had sore and bleeding gums
previously,anytime?Then please mention.
Also i would like to suggest you to take treatment for flu but please make a simultaneous visit to your dentist
too.so that the gums can be evaluated clinically and the treatment can be offered to you.
Meanwhile use antiseptic mouth rinses
along with warm saline rinses that you are doing.
please write to us for further query.
Hope it helps