Tooth stabbing pain for few months?

Hello, Since few months I have an issue with one of my tooth. I was hoping it would go away by itself but it didn't. This "stabbing" pain only occurs in certain circumstances, like if I bite I won't feel anything but I will feel it while chewing in some angles. I've examined this tooth pain further today and it turns out it only happens when I pressure it from the side right next to the gums (if I touch tooth from the side but in other spot I feel nothing). I do feel cold and warm in this tooth so it sure seems alright. Could anyone tell me what could this be?