So Confused. Missed Period. Please Help?

Ok, so I was supposed to get my period on the 16th but it didn't come. Normally before my period, I have cramping and my breasts get sore. On the 22nd I had some very light spotting for just a couple hours and then it stopped. The same thing happened on the 23rd. For just a couple hours and then stopped. The 24th showed no spotting at all. I took a pregnancy test on the morning of the 25th and it was negative. Later that day I had some more spotting a little longer than the other days. Then it stopped. The 26th (which is today) I took another test coming negative and more spotting, a little longer. Is it possible I could be pregnant or is this a later, lighter period coming. BTW, my husband and I have been ttc for about 9 months now. I have not felt any cramping or sore breasts at all. Though I have felt other pregnancy symptoms like fatigue, nausea now and then, frequent urination, feeling bloated, change in waist size. But then every once in a while I get this dull pain in the right side of my stomach, and also every once in a while a weird sort of feeling not like period cramping in my stomach as well. Having never been pregnant before, I'm not sure what to be feeling. Please does someone have any suggestions or has gone through this before?