Thorns in your feet and ants are going to wreck your HHP as a newbie. You should give some serious thought to accepting some bandages from a helpful neighbor and maybe even paying them back with some basic curiosities or food. Not only does it improve your relationship with your neighbors (People love trade partners and treat them a lot better than random people in the area) but you'll be at full health again in no time with just three bandages and first aid.