Important question

I had intercourse early in the month, good old pull out method. Took some extra BC pills to counter just Incase timing was off and smooth my own anxiety. About 6 days later I had intercourse again. This time it seems like it was my peak ovulation day and I took plan B the next afternoon. Following I started what I thought was spotting and took a pregnancy test. “Not pregnant”. I said ok, whatever. The day before my period I took another, same result. I had spotting for about 3-4 days after taking Plan B. I’m now 4 days late for my period. I know when I hit a week I have to see my OB.

Could that “spotting” of been my period early? Should I get a blood test and assume 2 false negatives on the take homes?

2 months ago I was pregnant and miscarried 6 weeks in. Never realized I was pregnant because I had what seemed like a period to me. I had a 2.9% chance that day ( same stat for the part of the story) but I was 31% capable in fertility, hence the immediate plan B. Took it within the 24hrs so it should still be 95% effective.

Thoughts? Answers?

Anyone experience similar?