Thanks for asking the query,
Bump at the roof of the mouth can be because of tooth infection , gum diseases or due to tobacco chewing.
You probably having infection in the upper tooth , this infection is causing pressure and swelling at the palate
or it can be allergic reaction to something like tobocco that come in contact with the lining of your mouth.
You need to visit to Dentist
get a checkup done ,
Take an OPG x-ray which will give the condition of the tooth and surrounding bone
Chewing tobocco causes many health hazards it can cause cancers of mouth , esophagus
White bumps on side of the cheek can be because of tobacco chewing , you need to get complete clinical evaluation of the mouth , quit tobacco chewing habit.
Get complete mouth scaling and polishing done.
Use antiseptic mouthwash gargles twice daily.
Take vitamin suplements , drink lots of water.
Avoid eating hot and spicy foods.
Hope this helps out.