Isotretinoin and lymph nodes

Im a 23 yo, 80kg, 188 height. I smoke very very rerely and I used to drink like once a month when I wasn’t taking accutane, or isotretinoin. I’m at day 18 of the medication and I noticed a small “ball” under my chin. I believe it’s a swollen lymph node, since on the medication there’s written that one of the rare side effects it’s a increase in size of lymph nodes. Should I be worried? I was thinking of waiting one week to see if it returns normal. And if not see a doc. I’ve read a story online of this guy who had my same situation and the lymph node of whatever this is never went back to normal. In addition I may add that if I lift my chin and head up completely it causes a slight pain and discombfott in that area. Thank you for the attention.