feeling discouraged

I had my son Sunday 2/12, I started off breastfeeding. I'm not sure if he was latching on incorrect or what but he was not getting enough and it became very painful. I feel helpless because he's hungry and I can't provide for him...... milk hasn't came in yet today makes day 5. I recently started him on supplementation milk until mines comes in and still nothing. Any suggestions .....? 😩😩😩