pregnant with no symptoms ??

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Would it be normal to be pregnant and have no symptoms? I'm on the pills but had one pill really late in the last active pill week. No it's day 5 of placebo pills and no bleeding and also none of the usual pms I get every other month? I don't have cramps, headaches, backaches or fatigue which I've had every other month of my fertile life... wondering if maybe that late pill ended in me being knocked up?