Confused ???

So , I am currently on cycle day 19. I had sex on cycle day 7. My boyfriend had a little slip up . And I know that it isn’t smart to have unprotected sex if I don’t want a baby . I don’t need any type of negative comments because I am human like everyone else. And it’s been plenty of women like me who has made this poor decision . Through my cycle and with this app I noticed I really didn’t have the “fertile cm” that everyone talks about but now I am having this small glob of clear discharge with watery discharge that doesn’t stretch ... has anyone seen this before and could help me understand . Please and thank you.