Period spotting ?¿

Had sex on the 18th but we used a condom and my periods are always like super far apart like 36 days or more but now I got something that could be like my period but is super light like doesn't even a fill up a tampon for the whole day ? SOS does this happen to anyone else ?? 
Ps. Also on antibiotics for strep throat but idk if that changes anything 

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors