Late period, BFN?

Today is day 30 of my usually 27-29 day cycle, AF predicted I'd start on the 10th. I've tested daily the last few days with FRER and all BFNs, so I don't think I'm pregnant. I had the tiniest amount of light pink spotting once when I wiped on the 8th, a little brown spotting on the 9th, and no signs of it coming. No cramps, tender breasts, ect. I've tried all the tips to bring on my period today. Vitamin C, hot bath, light excercise, sex, and nothing's working! I'm due to start clomid next cycle and am being super impatient and a little confused because I'm not often late. Anything else I could try to get things going? Anyone else have this happen and ended up pregnant already even though test showed negative at 1 day late?