Spotting at 24 weeks can happen, but it's really something best discussed with your doctor straightaway, even if it's light, better safe than sorry during the second trimester. I know it's scary, but your doctor will be able to check what's going on and give you proper peace of mind, whether it's something minor like a cervical polyp or something that needs monitoring. Do get an appointment soon if you haven't already, sayang, and in the meantime try to rest a bit. Hoping everything turns out okay for you.