5 days of ouch is not uncommon for me on human grade Sus. Some shots just hurt.
How many cc @ time? 2 or 3 is going to hurt.
Lumps? Have you been hitting the same spot OVER and OVER?
Think Prop hurtz?Throw some Stanoz in w/ that Sus or prop an see how you like That.
No fever? You breakout w/ a fever you need attn.
Could have an infection, just like if you sat on a dirty 23ga staple sticking out of a shipping pallet.