After surgery for an obstructed inguinal hernia, it is common to have some lingering discomfort or weakness for a few weeks, and the medicines you are taking, Phenytoin and Levetiracetam, are for seizure prevention and are not related to infection or cancer. Based on your history, there is no clear sign suggesting cancer, and infection would usually present with fever, increasing pain, redness, swelling, or discharge from the surgical site, so if you do not have these symptoms, it is less likely. Feeling low or depressed can happen after surgery due to stress, recovery time, or medication effects, and should be addressed as part of your care. The best next step is to follow up with your surgeon to examine the operated area and with your doctor/neurologist to review your medications and symptoms, and if low mood persists, consider speaking to a mental health professional for support. Meanwhile, focus on gradual physical activity, proper nutrition, and rest, which help recovery.