do I have a chance of being pregnant ?

Came off BCjune 10.

Had a withdrawal period June 12-15

Had pull out sex I’m scared about pre cum June 20

Took plan b 11 hours later June 21

I tested negative June 24 and 26. I’ve been testing like crazy because im very nervous

I’ve been doing opk tests since Sunday and apparently I’m near ovulation but not quite??? So did plan B work???

When should i test? I plan to test July 4 and July 11. Idk when my period will be !!