I am pregnant? 2 day bleeding two days light brown water

Last Normal Period 2.9.18 30 day cycle

4 day Period 3.9.18 33 day cycle..normal cramping 2 heavy and 2 days extremely light flow. I almost forgot I was on my Period.

Not sure if I’ll have 30 day cycle or 33 day cycle this time around .

I was feeling symptoms during the two week wait but stop tracking when I thought I was having a normal period.

I’m confused because last pregnancy I didn’t know until later 12 weeks

Yes, I have taken test and they have been negative. I just want know if it’s still possible