I just had a baby 6 weeks ago been having sex for 3 weeks and I thought my period was coming but it was only spotting for 2 days could I be pregnant? The blood wasn't dark or anything and my period is due

Of course you could be pregnant, especially if you aren't breastfeeding.

Now, remember, that your periods may be off for a while since you recently gave birth. The spotting could have indeed been your first period after the birth of your baby.

If you are not ready to be pregnant again, please start using protection.