I have had my eyebrow pierced for 6 weeks now and in Feb. or March softball season is starting for school ... the games last about an hour and a half ... is it ok for me to take out the jewelry and leave it out for that time?
I do not think they would let me use a retainer to play sports.
The majority of althetic games are starting to insist in the removal of all jewellery.
By that time, your piercing should be old enough that you can remove the jewellery without the risk of losing the piercing.
But please be careful not to injury the area as this can cause the body to swell and then inserting the jewellery will be impossible.
Good luck