I've had a similar problem, so created a non-segwit wallet and moved everything there. It seems to be too soon to go to segwit, it's not supported enough yet.
This right here, I wouldn't delve into something yet which is untested and isn't even being supported by the most major players in Bitcoin. Keep your Bitcoin safe, stable and then when the time comes move if you really so please.
Could I ask where you have your bitcoins right now? What wallet?