I've had this for ages. It. Is. Grim. Had an e-consult with GP about it 2 months ago but ONLY because I'm pregnant and the pharmacists won't sell me any OTC treatments. I could get a treatment online but don't know if they'd be safe to use in pregnancy. The GP asked me to take in a toenail clipping which I did the following day but the results still aren't back and this 'thing' is getting worse and worse.
No pain, no other toes affected (yet).
I did warn you about the pic and I'm sorry.