Is that your middle finger on the left hand? That's tough - depending on your technique you might be pressing right on the cut.
I think your best bet is to simplify your lines and avoid using that finger.
If it makes you feel any better, I started skype lessons last night with Anthony Wellington. Basically I've decided to "start over" on the instrument. He gave me his "24 variations" 4-finger sequence patterns along with 3 notes per string major scale positions. All done to a metronome. And you don't always start on the downbeat. Talk about frustrating/humbling...
Maybe this will help. Rob finally finished my new 4-string