Possibility of getting pregnant?

I was in birth control for two years it made my period very irregular. So Wednesday I switched pills. My last period was the 18th. I had spotted that lasted like three days. I had cramps and other period symptoms but the bleeding didn’t even fill a pad it tampon, for three days. Me and my gyno called it a period. <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> says im fertile, it never says that because I’m on bc. Last night I had sex. We didn’t use a condom. I should be covered of pregnancy because I took the first pill within the first 5 days of my period, right? Could I be pregnant? Should I get a test?

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