Late and unsure

I'm not really sure what to think...Lately my cycles have been 24 days, but on average 25. Today is day 28 and I don't know what's going on. I've had extremely light spotting for 3 days and have been feeling bloated and crampy as well. Since I'm not usually this late, I took a pregnancy test this morning and negative. I feel so on edge not knowing. Did I test too early? The test said that it works up to 6 days before your expected period, and this is several days past mine. We've been trying to conceive for a year and a half. It's been a difficult road. I'm trying to keep faith, but it's really hard when I don't have anyone to talk to aside from my husband. He tries to understand, but i feel like I'm on an emotional rollercoaster every month. Thoughts anyone?