I discovered that recently I lost about 7 lbs. in a month. I only weight 85 lbs. I am 41 years old female. I feel dizzy and fatigue. Sometimes my heart beat very hard and fast, especially after I eat. Frequently, I have diarrhea.
Last week, I started to feel the pain in my front lower neck. I can feel a lump on my front neck on the left. It hurts when I swallow. Sometimes the pain traveled through the back of my left ear. I feel like something is stuck in my throat. I did not have a fever. Sometimes I feel hot but when I took my temperature, it was normal around 98.6 F. My voice changes sometimes. My voice sounds hoarse when I just woke up.
Is it thyroid cancer or hyperthyroidism?