Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Follow any emergency antibiotic plan you were given, but do not let taking an antibiotic delay assessment.
Call emergency services for difficulty breathing, chest pain, fainting, confusion, uncontrolled bleeding, or severe and rapidly worsening abdominal pain.
Contact your surgical team promptly for increasing wound redness, drainage, worsening pain, repeated vomiting, trouble eating or drinking, or a swollen abdomen.
Also call about new calf pain or swelling.
Because infection can become serious more quickly without a spleen, seek urgent medical advice for a fever, shaking chills, or feeling suddenly very unwell.
For routine care, tell healthcare professionals that you have no spleen.
Ask for advice before travel to places where malaria is present and after an animal bite, because extra prevention or treatment may be needed.
Every sign above is quoted from the sofidex article on Spleen removal. If you are not sure, err upward — it is always reasonable to be checked.