I think I screwed up...

Things were going great with nursing my DS until I got mastitis.  I am still on medication to treat the infection for a four more days.  Well for me personally, I found it was too unbearable to nurse on the infected breast and I started pumping.  After nursing on just my left and pumping on the right, I decided I would just pump both at the same time until my breast felt a bit better.  Of course that means I gave breast milk in a bottle to my DS for the past two days. Since yesterday, I have been trying to get him to latch on for nursing and he will latch and lets go after like five seconds.  He keeps pushing away and crying when I try to re-latch.  Did I completely screw up breast feeding?  I have tried for 10 minutes straight (every feeding time) to get him to latch and it just isn't happening.  I've been trying to stay calm and soothe/encourage him to attach and stay put until he eats, but I don't want to starve him either by battling with him when I have plenty of expressed milk in the fridge. Thoughts or ideas?  Honestly, I was hoping to have a great nursing experience but the most important thing to me is that he has breast milk and if I need to pump, than I will.  Just not sure if there is any coming back from this or if I screwed up beyond repair?  Thank you all so much and I appreciate any advice!