Really Confusing Menstrual cycle

Hi guys, this might be tmi for some so please scroll on of this is too much for you. Thanks

I am 32 year old mother to 3 boys and been with their dad since I was 14. We don’t use contraception for personal reasons which I don’t feel comfortable disclosing.

On the 19 of July I got my period (or at least I thought I did) it started off brown (no cramping, zero pain), sometimes The brown colour happens the first day and then it flows to a normal heavy red period and I always have severe cramping and pain for the first 2 days of my period. The brown colour period wasn’t wet or watery, stayed brown with a kind of thick consistency for 2 days and then went. My period isn’t due till the 19th of August. On the 3rd to 7th August I had sore breast (which I usually have before periods are due) but On the 7th of August I noticed a really light creamy pink fluid come out, it’s not heavy I’m just spotting, it’s super light doesn’t fill up a tampon at all, too be honest I wouldn’t even have to worry about a tampon, a liner would do more than the trick, it’s getting lighter and today is the 9th of August I could really get away with no tampon or liner That’s how light it is. I have been taking pregnancies tests since the 19th of July and they have all came back negative.

Next step is Gp, blood test and ultrasound, I will definitely be seeing the doctor. I am curious to hear other people’s experience. (hence this post) I’m not asking anyone to be a doctor and confirm I am pregnant or asking to be diagnosed.

Has this happened to anyone else? Light spotting pink period, Negative pregnancy test, but ended up being pregnant?

Light pink period, negative test and wasn’t pregnant?

Did periods returned to normal?

Or was there another reason this happened to you?.

Sorry for all the questions. I have always had a heavy period, and severe cramping/pain to the point of tears.

I only ever experienced weird periods like this when I was pregnant with my 2nd and 3rd baby and the pregnancy tests I did back then always came back positive.

Thanks in advance

Edit: I just did another 100th test since the 19th of July and this one came up with one pink and 1 white line (which didn’t happen at all with all the other tests I did and you could see it clearly even my partner seen it without trying to look hard) but the line has now disappeared.