When should I take pregnancy test?

So my cycle goes something like this at the bottom pic . My monthly comes on between 28-32 days. I’m on day 34. I’ve been having cramps for two weeks like my monthly coming on. I’ve been having discharge likes it’s coming on. But every time I check my panty liner there’s just creamy discharge. I took an pregnancy test day 33 it came back negative. But since my cycles never same days I’m not sure what to think. Anybody been cramping week monthly due and end up being pregnant? Please comment