Ay, common lang yan, sis! Maraming moms sa circle ko na may sipon after their tetanus shot, kaya hindi ka nag-iisa dito. Best to double-check with your doctor or call the health center where you got the shot para sigurado, lalo na kung ang sipon mo ay tumatagal or may fever, pero usually it's just coincidental timing, parang body lang mo responding sa vaccine while you're also fighting off something else.