Hello, Welcome to Healthcare Magic. I have read your question fully and understand your concerns. Lyrica (Pregabalin) can cause fluid retention in the body, leading to swelling of legs. This is a common side effect. It can also cause breathlessness though it is a rare side effect. Lyrica can also cause balance problems. You could stop the Lyrica and see if the symptoms settle down. If the symptoms subside you could try an alternative pain relief like Gabapentin. If the symptoms still have not settled, you need to see your doctor for further evaluation, as there could be other causes for the fluid retention. I hope this answer has helped you. Thank you Regards Dr Sunita Sayammagaru