Trying for our first baby and no luck

It's been 5 months since we've been trying for a baby. We haven't found luck. My husband and I have been using conceive plus lubrication. Even then, we feel nothing is working out. Not sure what's that we are missing out. This time, my menstrual cycle duration was very short compared to my cycle all these years. I was spotting initially and started bleeding like a regular one for 2 days and then again it was brown blood the last day. I would love to hear your suggestions, experiences. Thanks!