Your reaction is normal, and just shows a concern for the outcome of your treatment, and fear of the unknown. The lymph nodes are often filled with fluids, and is not a true measure of the tumor itself within. When the biopsies are done, they can tell the true size, and re-stage the disease. There are other factors as important like node ECE, PNI. It's not uncommon with HPV to have more than one nodal involvement, and that are bigger than the primary due to the richness in blood supply, and nutrients in that area.

Good luck with surgery tomorrow.