It will eventually come around and you'll have that half hard, (I call it flushed flaccid) look you so desire. Your cock is doing what comes naturally--kind of like your balls that shrivel up to protect those little sperm from the cold. DO try to let it hang loose throughout the day--no tightie whities, o.k? And whenever you feel it flushed flaccid,
try to do a work out at that time. If you can organize your p.e. sessions around your body rhythms, i.e, cock rhythms, you'll get a lot more of your workouts.
When you are out and about, don't forget piss pulls and kegeling. Your cock will get the message, believe me.