Breastfeeding/ pumping

GTO 🇲🇽 • Mother to the best son in the world ♥️ Rest Easy ❌❌❌
I just got my breast pump in the mail today and I tested it out on one side for literally a second and it hurt as soon as I turned it on! 😭 So now I have some questions. Is it supposed to hurt that bad? Does breast feeding feel the same? How long do I pump/feed on each side? Any advice for a ftm.