Has anyone else had this happen to them?!!!!!?

Yes & I was trying for a baby too. I took like 10 tests, googled "false negatives", the works. I was so disappointed when I finally got my period. Oh & when I did get my bfp, it was on the day I thought my period was due (it could have been due the next day. Mine could fluctuate a day or so each month) & the line was unmistakable.