Help needed

Hey I am in need advice....... so here goes.....

I gave Birth to my LO in April and had my first period after birth in July (9th-15th) I had sex August 4th and was due my period August 13th but was a no show I took a test August 18th (negative) and again August 20th (negative)

Could I possibly be pregnant?

Wad it to soon to test?

Or is it that they are now irregular

I don't think I'm that lucky to have fallen pregnant again after it taken me 8years to have my 1st LO (not for the want of trying)

Please no horrible comments and thanks for reading and or replying xx