Had a right inguinal orchiectomy a week ago. What is still down in my scrotum that is swollen? Shouldn't anything that was cut be in my abdomen?

Orchiectomy . Likely a hematoma (liquid or gelatinous collection of blood) that had settled in the scrotal sac. If so, this should resolve with time. Mention it at the time of your post op follow up (or sooner if its enlarging).