Confused

ACHTUNG! Women thing!

After my post about having a baby, here I am posting about something out of the ordinary. Anyway, I had my regular period last month, and when I say regular, it lasts for 6 days. Then this month, I was delayed, for about 5 days, my period came just yesterday but it is really so abnormal, it is more like spotting. What I find weird is, in between my last period until yesterday, my husband and I didn't do anything (except last Saturday when we were in Stuttgart). Anyway, that is what I find too confusing.

How can you have a regular period that lasts for 6 days with really strong flow and then pregnant. Is that ever possible to happen? Most that I find in the internet has more of like spotting than regular period.

It is so confusing being a woman... :(