Thanks for writing your query.
After reading your post, it seems that your symptoms are all medicine induced reactions.
Itchy rash can be due to side effect of antibiotic you had taken.
The other two symptoms can be due to taking medrol
Medrol is a steroid and it increases the blood pressure.
Heart burn can also be caused by medrol, as steroids
tend to increase the acidty symptoms by causing damage to the mucosa of the stomach.
You can take antacid
150 mg twice a day before meals.
Also avoid spicy foods as they will increase your heartburn
If the problem persists, get yourself examined clinically.
I hope this is helpful to you.