As you are having persisiting cold and cough,you might be having upper respiratory tract infection(URI).Upper respiratory tract infections are diagnosed according to the types and durations of symptoms.Cold symptoms that last for months,but are not caused by sinus problems
,may actually be allergy-related also.Foul breath may be noted because resident florae process the products of the inflammatory process.
Read more about the URI here:http://www.emedicine.com/med/topic2339.htm
You need complete course of antibiotics i.e
amoxicillin.Decongestant and Antihistamines and Mucin D will help to improve symptoms but will not clear the infection.You can also try steam Inhalation.
Please avoid oily,fried and spicy foods.
I would like you get your illings revalauted- As if the sensitivity
persists there are chances of
the tooth having a dieing nerve and this tooth might need a root canal therapy
!This probably means the pulp
has been irreversibly damaged by Deep decay
or any crack/fracture of filling.What happened initially with this tooth is that the bacteria has penetrated beyond the dentine and inhabits the pulp,Eventually the nerve has died and has become necrotic.
Tooth can also be abscessed without any gum swelling,and causing throat pain which at later stages can also cause throat swelling,As there is possibility of infection under the apex of a tooth without any symptoms.I would certainly investigate any possibility of any dental
infection that may be draining into the throat.
You also told that your gums bleed when you brush or floss, For this i recommend you to get complete scaling and root planning(CLEANSING) done by a dentist,your gums bleeding can be indicative of gingivitis(inflammation of gums) which can be corrected,You can also use mouthwashes,which will help in fighting against any bacteria.
You can use listerine or chlorhexidine
You can start with warm saline rinses which will help you, Do it 3-4 times a day.
For your sensitivity you can use any otc desensitizing toothpaste which will provide relief i.e sensodyne.
And about your recent habit of tobacco chewing, please try to reduce it and stop it as soon as possible. I am glad that you are aware of the consequences,so please stop the habit as soon as possible for your better oral and also general health!
I can understand your situation,but donot worry,If funds are posing a problem than you can approach your local/state dental association for help.
You can contact them here:
Also,Best is to get a treatment done from the Dental School in your city.
Have a look at this site:
Feel free to ask again if you have doubts