Pregnant? 🤷🏾‍♀️

Okay so I had sex with this guy and we ended up needed to get plan b because he couldn’t pull out quick enough. Mind you i was ovulating when this happened and not on bc. So it’s been about a week and some change since the incident. Last week( the week after i took plan b) i started to experience tender nipples, back pain, spotting. I’m not sure if this is a side effect of the plan b or early symptoms. I also got a yeast infection last weekend so idk if the spotting is a result or what’s going on. Any pointers? I plan to take a pregnancy test Friday as my period is supposed to start this weekend or should i wait?