I'm not a doctor, but I can try to provide some general information. It's possible that the symptoms you're experiencing could be side effects of chemotherapy, but it's important to consult with your healthcare team for a proper evaluation. Chemotherapy can affect different individuals in different ways, and side effects can vary depending on the specific drugs being used.

Dry cough can be a side effect of certain chemotherapy drugs, as they can irritate the lining of the lungs. Rashes can also occur as a result of chemotherapy, as some drugs can affect the skin. Joint pain is another potential side effect, as some chemotherapy drugs can cause inflammation in the joints.

However, it's important to note that these symptoms can also be caused by other factors unrelated to chemotherapy. It's always best to discuss any new or concerning symptoms with your healthcare team, as they can provide a more accurate assessment and guidance based on your specific situation.

Remember, your healthcare team is the best resource for addressing your concerns and providing appropriate advice.