I am obese, as i weigh 194 lbs and am 5'4. many people have been telling me i've been breathing loud and heavy. does this have to do with my weight?

Likely yes: It is possible that as a result of the extra weight you may have what's called obesity hypoventilation syndrome aka Pickwickian syndrome. This can also result in sleep apnea. I would recommend that you see a pulmonary specialist who may be able to interpret tests to help determine this and guide you toward treatment that will likely include weight loss.

Likely: You have class 2 obesity. loud breathing can be due to Obesty. Development of obstructive airway can occur in Obesity or deconditioning and lack of exercise can lead to heavy breathing with mild exertion. Weight loss may help reduce symptoms