Needing help/advice

I’ve been in a relationship for going on three years this month now. We both decided that we were ready to start our own family, so we’ve been trying for a good three months now. Every time I had an idea that I could be pregnant, the test always came back negative. A month or so ago, I bought a test because my period only lasted 3 ays. When usually I last 5-7. My latest period I just had was a lot heavier than normal, I was bleeding through my pants in the middle of the night, usually my period is real light. I still have the other test that I bought, but I’m not sure if I should take it or not. I stopped getting my hopes up, and getting excited about these tests. Am I not waiting long enough for the results on the test? What can I do to speed things up?