Is it wrong???

A couple months ago me and by boyfriend thought I was pregnant. I was bloated, had cramps, dizziness, nausea, and was fatigue. My period was also like a week late. We weren't TTC and we were both very worried. I took a hpt and got a BFN. When I found out that I wasn't pregnant my heart sank and I was depressed for a couple days. Is it wrong to think that way since we weren't TTC?