Need advice...cycle change or something else??

So my period has been every 34 days for about a year or so now. It always lasts 5 days with the 1st two days being really heavy. According to Glow I was ovulating from 8/15 to 8/17 or so. Had sex 2 out of the 3 days. Two days later I started spotting but then it got a little heavier a few days later, not like my period but more like the last day...enough to wear a pad but I would only need one the whole day. This lasted for a week and then last night it disappeared. That means I spotted/bled for 10 days which NEVER happens, ever. Took 3 pregnancy tests on different days and all came out negative. My actual period was due today and nada. Anyone ever go through this???