I need someone to help me try to figure this out!

Due to the whole coronavirus nonsense going on right now, I’m unable to get an appointment with my OBGYN. I just found out I was pregnant 2 days ago and I’m so confused!

January 18th, 2020 I started my period, lasted 5 days and my cycle is usually every 33 days.

February I totally skipped my period, but took a test on the 27th and it was negative (pic)

So I just assumed my period is all out of wack for whatever the reason may be.

Here comes March 21st and I decided to take another test and BAM.

Positive as can be.

Now my question.. When the hell did I get pregnant if I didn’t have a period since January and tested negative February 27th?