Should I wait to test again?

Hi ladies!

So I’m a little worried because I didn’t start my period all of April, Today is the first of May and still no period. I’ve been having a lot of white discharge but no spotting what so ever. Today I went to a clinic that does free pregnancy test and it came out negative. In February I took a plan b pill that set my period till the last week of March. My period was suppose to start on the 25th but it never came, could this be a sign from the plan b still? Could I be pregnant but wouldn’t it show already? should I wait to test again?? Has this ever happened to anyone?? So many questions please respond 😣