Ouch! Yes, I'd see your regular doctor. ER's are good for that acute situation (they made sure there was no fracture, straightened it and splinted it) but I'd follow up with your regular doctor for further instructions. There are types of massage that can be done to help. And even further procedures. Given your desire to play guitar and fear of mobility, I'd definitely make sure you are doing everything you can. Got an orthopedist you can see? If not, go to your gp first.I think I'd want to know if there is massage, exercises you can do, etc. that will help. You did the right thing to get it looked at right away and it does take a bit of time to recover but with your desire of using finger to play guitar, I'd follow up with after ER care. https://www.emedicinehealth.com/finger_dislocation/article_em.htm