HELP: Does light pink always mean implantation bleeding???

I started the pill about 3 and a half weeks ago, I've had spotting almost the whole month (nothing hectic) which I assumed is normal because it's my first month on the pill.

I started taking the pill on the first day of my period and it states if I start taking it on the first day of my cycle it will protect against pregnancy IMMEDIATELY (no need for a 7 day backup) but now I have super light but very pink spotting/bleeding just when I wipe.

I am freaking out!!

The previous wipe was a lot pinker, like a pink blotch on the toilet paper. Is it possible for me to be pregnant???!!!