Why can't I have a baby?! 😟

I have been trying since my husband and I first got serious back in 2010, we got married in 2012, and we've only had one positive pregnancy test, and ended up being a belighted ovum. 😤
My periods are the furthest from normal and they started getting normal for a while then slowly started being longer and longer between each one.
Well now here we are, haven't had a period since  October 13, it's now November 28, and I'm terrified to take a test because that little negative sign it the one thing that could crush me!