Help! Swollen neck lymph and bad double chin. Does this subside??

I’ve finally just finished accutane and it has helped clear acne so much however I have a gnarly double chin.

At first I thought I was gaining weight and lost about 5kg of weight doing keto for 4 months but at my skinniest I still had this bad double chin.

I then realised I had solid lumps either side of my jaw just under the jawline, and found out swollen lymph nodes are a potential side effect of accutane due to the weakening of the immune system.

My question is, has anyone else experienced this and if so how long till it went away?