Hey there :(

I took a plan b in May and i got my period a week or so after it was the almost the end of May cus i usually get my period at the 23-26

Then i got another period first June, and now its a week late and i cant be pregnant so I took a pregnancy test and it's negative. is it something usually happens after Plan B because it's my first time taking i. I have cramps my body hurts and I get the usual things before my period like headache craving bloating. I'm so scared I cannot be pregnant so can anyone reassure me? Is this normal or?

Thanks