I'm on birth control and had sex on my last week pack ( no pills ) well had unprotected sex, he pulled out but some cum got on the outside, well 29-30 I started having abdominal cramps

1 I spotted very very light pink, only caught it when I wiped, 2 I spotted dark brown than, I had my period 3 days which was on and off a lot, than on the 7 I spotted a pinkish brown, and from the 18 and on I have been having morning sickness and light periods

took this on June 7

took this June 12 should I test again?

since than I've had light periods except the 18 when I had a heavy bleed for 2 minutes than it went to light, I'm on junel fe 1/20 birth control. Has this happens to anyone before