Plan b and pregnancy, please read full post

So I took a plan b about 3 weeks ago due to using pull out method, last week my boobs were very sensitive and I was having very very light spotting and so as soon as it turned 2 weeks and 1 day I went ahead and took a pregnancy test, let it run for the longest the test is allowed to be read which for this test was 5 minutes and it was a clear negative, even posted on this group to make sure. Any ways after the light spotting i started with an extremely heavy flow which I believe is my period that had arrived 2 days early, like I don’t think I remember it being this heavy even after giving birth. Of course I did read the pamphlet and I no breast pain and spotting and heavy period is normal. But today after 5 days of very heavy bleeding and what has now subsided into light bleeding the end of my period I’m extremely nauseated, food isn’t smelling right or tasting as it should. I’m worried that there’s even a possibility that after plan b and this heavy bleeding that I think is my period is still a pregnancy.

I’m married and not ready for another child at the moment, I know this is stuff I should no but unfortunately I’m pretty clueless at times. And this was definitely a slip up, we always use protection but this is just a thought. I may be reaching lmao