Do I wait or do I take the test?

Kirsty
I had surgery 6 days ago and by all accounts was a complete success. The surgery was on my ear. I had unprotected sex during ovulation and my period was due 5-7 days ago. I've heard that operations can possibly stop your menstral flow in its track because of the stuff they use to knock you out. But I'm still thinking I could be pregnant. I've had dizzy spells, feeling sick, cramps on both sides of my stomach and now a missed period. 
Do I wait to see if it comes back on it's own or do I take a pregnancy test??

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