Here is something else,that can be done for instant relief: 1) You can try 'Toothache Drops' available at pharmacy.
2) Application of Clove Oil to the aching tooth is best to reduce pain. Clove oil contains eugenol which is very soothing to exposed tooth.,Place a drop or two on cotton pellet and place it on the tooth in the cavity/decayed part of the tooth(hole)
Other than this you can also to the following at home,as application of heat sometimes does help to reduce pain,You can start rinsing frequently with hot salt water solution-- dissolve ½-teaspoon of salt in 8 ounces of water as hot as you can tolerate without burning the mouth,and rinse for two minutes every four hours, this will provide you relief.
Also avoid eating, hot, spicy and hard food.Donot brush hard or chew hard foods from that area. Keep that area clean and free from food particles.
Other than all this,visit your dentist as early as possible and get the tooth properly evaluated and get get it extracted.You will have to get in touch with a skilled dentistt/prefferably an oral surgeon as early as possible.
As you told that you donot have dental insurance,you can try the following avenues and see if they work for you(this is for future help)
There are various plan options for you to choose from,.The membership fee for an year ranges from 99$ to 149$.Have a look at the link,to choose the best possible plan that suits you.