I may have ovulated (2/3 day of cervical mucus) and the condom broke - but there was no (or very limited) ejaculation inside me. took planb 3hrs later will it work?

Can do a preg. test: Plan B works regardless of ovulation, broken condoms, or ejaculation. Plan B can alter the menstrual bleeding for the cycle in which Plan B was taken, and sometimes the next cycle too, so there may be some irregular spotting. One should be sure to check a home pregnancy test about 3 weeks after sex, because Plan B works most of the time, but not all the time.