Till that time, avoid using any lotions and creams for the meantime. Use a mild cleanser with moisturizing properties like Cetaphil and apply calamine lotion on the itchy skin. Also use cotton clothes and change the clothes twice.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.