Help Light pink blood

My periods are pretty regular normally no more than a day late. According to this App I’m on day 6 of being late.

The week before my period was due I’ve been having cramps off and on. Yesterday I had very light pink blood only when I wiped nothing in the toilet bowl and nothing on the sanitary towel.

Today I’ve woken up thinking I would have my normal heavy period, but it’s still light pink there is more now when I wipe but after a few wipes it’s just a tiny pink dot of blood. 3-4 drips of blood in the toilet bowl. There has been one single tiny blood drop on the sanitary towel in the last 3hrs.

Is this normal? Could I be pregnant? Following the app it shouldn’t be implant bleeding as my period is 6 days late. I’m 36 and I’ve always had heavy period so this is very abnormal for me to have light pink blood and not have a sanitary towel that like I’ve just been massacred. I’m TTC. When would it be worth taking a test?