What is going on with my body?!?!

I have been extremely bloated for about two months now and cannot figure out a way to get it down. I am about 5'6" and weigh about 110 lbs. My stomach is protruding a ridiculous amount. I usually have a very flat stomach seeing as I eat very healthy and exercise. I eat gluten free and I have been trying dairy free for about a week now. Also, I haven't had my period since the beginning of December. Now, the obvious answer would be that I'm pregnant. I have taken two pregnancy tests (both within the last month) and both results were negative. My breasts are not sensitive and I don't have frequent urination. I also have bowel movements usually once every two days, sometimes firm but mostly watery. This condition I have been in makes me seriously uncomfortable and unhappy, keeping me very stressed out. I try to ignore it most days because I know stress will make it much worse. I have been to a Naturopath twice and they simply suggest getting my thyroid tested and doing an elimination diet. I would love some advice for something to make this bloating go away NOW. I'm getting to the point that it makes me absolutely miserable, affecting not only me but also the way I treat others. Thanks for any and all help.