Clear discharge near period on birth control

Ive been taking lo loestrin fe religiously for the past month and i took a plan b earlier this month ( stupid ik i just wanted to be safe bc is my first month and i had sex on the 7th day ).. I’m getting a very small amount of clear/whitish discharge and my period is supposed to start in the next 2-3 days along with some cramping and a mild tenderness in my breasts.. is this normal on bc?? Is it the plan b? Or should i worry abt pregnancy

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