Any ideas?

I had my ectopic pregnancy surgery March 21st, I was 11 weeks. I got my right tube removed. I got my next period April 26th-May 3rd. On May 17th 18th & 19th I got a positive ovulation test. My next expected period was suppose to be May 26th. My cycle is usually 30-32 days. I took a pregnancy test on the 26th but it was negative. Last night, I spotted brown only twice. I thought it was my period. Late last night, there was no blood and this morning into right at this moment, still no blood. What could this be?