My 2yr old has epilepsy today she had a outburst of nonstop screaming nothing I did helped now she has 2 swollen lymphnodes in the bk of her neck help?

Get her checked. Doesn't sound like the epilepsy is the issue. Lymph nodes indicate an infection nearby, so if there are swollen lymph nodes there may be an ear infection or a sore throat, etc. A general viral infection could cause her to be fussy and irritable and have some swollen nodes as well. I'd get her checked to be sure.