Periods

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So I had my baby 10 weeks ago and have only had 1 period since then, I was due on the 17th of this month so it’s nearly been 5 weeks (34days) is this normal?

I’ve taken 2 pregnancy tests over the last couple days and both came back clear as day negative, I’m so confused?

I have had period pains the last few days but nothing

Help?! Lol