It is 3am and I cant sleep. My whole body just hurts. I am bruised, blistered and scraped. I have lost 2 toenails so far and I can barely walk. I am NOT exaggerating. I have never felt a world of hurt quite like this.
Not such prettywoman feet now.
Just kidding, In my opinion and I think others may agree. You should always break in shoes/boots prior to an extended hiking trip. I'm not familar with the boots you had but some will take weeks to break in and some need almost no time for break in. Yours since you lost 2 toenails obviously needed more time than was allotted.
As far as pack weight that is all over the range with opinions but my son (115 pounds) can go all day with a 20-25 pound pack so my opinion is you will need to be under 30 for comfort.
Better luck on your next trip.
Doc Mike