I Just Finished Chemo For Triple Negative Breast Cancer In

I just finished chemo for triple negative breast cancer in oct. 1917. I also did radiation and my final treatment was Dec. 24th. Lately I feel a "stitch" in my left side...I am thinking my spleen. It feels like something is "swollen". I also noticed that it seems like I have a swollen groin lymph node on the same side. I am currently on Letrozole.