Pregnant? Who has advice?

Hi everyone!

I'm S., 25 years old, and together with my husband, we already have a little boy of 27 months.
We decided to go for a second baby, so we've been trying for a while now

I haven't taken the pill for 1.5 years and we used a condom before that.
Now, I've had irregular cycles over the past 3 months, which led to lots of tests. But now everything feels different... Let me explain!

With my long cycle (average 39 days), it's always a wait-and-see when I'll ovulate, but since I can feel it, I've had a bit of luck. My last period was on July 3rd.
My fertile days this month were between July 14th and 19th.

Last Saturday and Sunday, I had stomach pain like I was about to get my period, which was obviously way too early. On Sunday, when wiping, I noticed a few pink spots. No bleeding, just a few spots, and that was it, along with some nagging stomach pain.

It's still too early to test, but I already tested last Saturday and, as expected, it was negative. My instinct tells me I'm pregnant. I felt the same with our little boy, and I still remember those nagging pains from back then.

I think I'll wait until Monday to test, because if I had a late implantation (which is likely with my long cycles), it wouldn't show up yet anyway.

Yesterday I felt so awful, stomach pain, back pain, weak muscles, it was crazy!
So it's a matter of waiting and hopefully I'll test positive in the coming days/week.

Do you think I'm actually pregnant?