I have been where you are. To be honest, you need to seek medical treatment. However, I have lanced my own before w/ no problems. I also have had to seek medical treatment because it would not come to the surface. You need to soak your hand in HOT (as hot as you can stand it for 2-6 hrs) Epsom salt water to draw it to a head. The longer you soak it the more it will draw. You will have to keep changing out your water so that it stays as hot as possible.
Also if you take a slice of raw potato and lay it on top of your hand (change the piece out as needed) it will help draw it. Not while soaking. I've even heard of people using pork fat back to draw abscesses.
If it is too deep and does not start rising to the surface within 7 days after you missed, you'll need to go see Dr. Also, if the swelling increases and IF YOU START SEEING RED LINES RUNNING UP YOUR ARM TOWARD YOUR HEART, you need to go immediately to ER or UrgentCare... You can cause permanent nerve damage, lose the use of your hand, have to have an amputation or possibly get sepsis and die.
I have been off the needle for almost 3 years and I'm very grateful. I was on heroin and Opanas and any other type of opiate you can think of. My husband and I both were and we are now clean. I will be praying for you.
Turmeric, neem, Echinacea and Goldenseal are herbs that purify the blood and fight against infection.