Hi Melissa and welcome,
First - just remember to breathe and not get overly stressed. If you've had the one node remain the same size for 2+ years even if it is "something", it's not much of anything. The few new nodes are quite probably also a lot of not much even if they turn out to be "something". All manner of causes for enlarged nodes and 1.5 cm is kinda on the smallish size.
If they are really a cause of anxiety for you, you can talk with your doc about doing a biopsy which is a simple procedure to give you clearer answers.
Exhaustion, as you're probably aware, can be caused by about a kazillion things and probably one of the most difficult symptom to find the cause. Stress, not eating right, depression, anxiety, all assortments of illnesses can cause fatigue.
Best to you on getting to the bottom of your symptoms!!
Sharon
