Have you spoken to your GP, fracture outpatients, physio etc? If it hurt after five balls I can't see it being better by the weekend and you need do find out why it hurt so much and ways to make it stronger and fitterA few weeks back I went to the range to try and hit some balls, after about 5 balls I realised my foot still wasn't right so left the rest of the bucket.
So here I am 87 days after I broker my foot....this weekend I'm going to try the range again and see what happens. It's honestly made me realise not to take your health/fitness for granted.