Pregnancy scare 23F

This is my first time posting so I apologize if something is wrong.

I generally have a very regular and stable cycle with little to no deviation. No blood after 7 days and cycle lasts 27 days sharp 90% of the time.

Next period is supposed to come in 9 days but today i had some pinkish blood after wiping and it freaked me out. I had unprotected sex in february and even though i'ce had two normal(?) periods since, i'm scared this could be implantation bleeding.

Basically the timeframe goes as:

- unprotected sex (with internal ejaculation) on february 20-23

- period came 26/2-2/3 || couple of days earlier and lasted shorted than the usual week (5 days)

- unprotected sex (no internal ejaculation) march 8-9

- period came march 23-28 || couple of days earlier as well but lasted almost a week (6 days)

- april 9th i get the pink blood and even though it becomes slightly darker later on the day there is no blood on the pad or in the toilet.

9 days is very early for me to have my period so this is why I'm concerned. Could this be implantation bleeding? Is it just a hormonal change? Is it the start of a very light period?

I have also been very stressed for the past months and it's getting worse but i have been stressed before and it never affected my period. Diet hasnt changed, exercise is regular and not super intense (pilates, maybe weights).

I don't have easy access to a pregnancy test for the next few days and i'm looking for some peace of mind, I guess.