Late period

Jude
So my periods have been a bit iffy but have never got to cycle day 33!? I had cramping & left side pinching for the five days I should have been on, now nothing much at all.....I tested 2 days ago in the afternoon, came out negative! Was it too soon and too late in the day or am I deluding myself! No other sysmptons that I have noticed!? Got an apt to see Doc next week as it has been 14months of trying