question: i injected myself with Lantus, and Novalog early this morning, both in my upper-inner thigh (a place where i haven't givin myself a shot in about 5 years). i usually give myself my injections in my stomach. a few hours ago, i noticed a huge lump on my thigh where the injections were given. it's not hard, just really red, and it hurts, itches, and stings. what is it?