Hi and welcome to HCM.
Yes,it definitely can cause
shortness of breath.
GAstritis,hiatal herni or GERD cause by high acid secretion.Symptoms that are experienced in such conditions are pain and tightness in upper stomach, bloating, breathing difficulties,
heartburn, feeling of lump and sore in throat, gurgling sound in throat, fatigue and loss of apetite.
Symptoms are aggravated after meal, long sitting, leaning forward,stress and anxiety. In the beginning this is treated by changing dietary habbits.
You should avoid alcohol,coffee,smoking,fats and fast food, carbonated drinks and eat more milk and milk products, fruit and vegetables,boiled food and natural beverages and teas. 1 hour after meal you should not sit or lay. Also lay with elevated upper body. If you are
overweight you should do often exercise.
Uterine fibroid should just be frequently checked up,this shouldnt worry you. Wish you good health.