Ganglion Cyst

Has anyone had a ganglion cyst drained and if so, how long were you out of the water and did you feel stronger after? I had ankle surgery in Nov to repair a sprained ankle. I went in for a routine follow-up on Monday and there was a bump that I thought was scar tissue. The doctor told me that he thinks it's a ganglion cyst and I'm pretty sure he's right. I've had 2 in the past (hand and wrist) but I wasn't swimming much at the time. Both were drained but came back shortly after and had to be removed through surgery. I'm swimming at Nats and I'm wondering if I should have this one drained since I feel like I've lost strength in my ankle as this thing is getting larger (you can see it!). This would probably be a temporary fix but I was hoping it would get me through Nats. Opinions?