Hello & welcome
Your problem is probably related to your gums only, if you don't have any history of continuous headache, feeling of heaviness, or dizziness
and vertigo while bending you can rule out sinusitis
For gums problem only paste can't help, you have to visit your dentist
for scaling and curettage.
Rest maintain your oral hygiene
using hydroxyl mouthwash in 1:4 ration twice a day, massage of gums with tan-X gum paint 2-3 times a day, & warm saline rinse.