are my symptoms a sign of having MG after having a thymectomy?

I have had a thymectomy on 4/29/24 a tumor was found on a cat scan for something not regarding MG it was stage 1 cancer which needed no follow up except for cat scans every 6-9 months follow up but lately I have noticed my eyelid is drooping and when I sleep I am awaken by my head and neck leaning on my shoulder bone and my teeth are not lined up it takes just seconds for them to reline to the normal position but I have never had this before could this be a symptom of MG?