too many periods????

Y'all okay so this is my period log from <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a>. These have been my periods over the past 2 months. I've been having 2 like every month..???
I took a plan b about 3.5 months ago and since then have been having double periods?
Is this normal or what??
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