Am I pregnant or not?

Hubby and I are TTC #2 and it just so happened that we started right in the middle of my most fertile time. I didn't know that until I looked up an ovulation calendar later. My period is late, my BBs feel huge and sore and I'm getting headaches. I had cramps about 5 days after we started trying (after I should have been ovulating) and they went away. I had some "period like" cramps last week but those are gone now too. I have taken a couple tests but they came out negative and I'm thinking I'm testing too early because we just started trying June 1st. My last period was May 15th and I have about a 31 day cycle. So from the chart, I was really fertile June 1-3. I found out I was pregnant with my first child when I was 5 weeks, so am I testing too early? Any help would be appreciated, this two week wait seems like forever!