I need help!

Warning, the pictures are kinda gross, I know this isn’t really related to this app, but I thought maybe someone on here could be struggling with this too and give me tips on how to stop? I’m 18, ive been biting my nails since around 5th grade, and biting my skin around my nails since 10th grade. I wear acrylics all the time to hide my short bitten nails. I know it’s really gross, I’m so disgusted by it tbh. But I do it with out even thinking when im bored, or nervous and I’ve tried so many things to stop. I don’t know what to do, at this point I’m so insecure about how my hands look that I’m constantly trying to hide them. This is what my fingers look like after I wash my hands or take a shower, for some reason it’s not as noticeable when my hands are dry. I need help on how to stop🤦🏼‍♀️ any advice? Should I see a doctor?