TTC: Going On Our 4th Try..

So, my wife and I have been TTC for almost 4 months now. My 4th cycle to try will be coming up within just a few days. Each time we've tried it's been a negative (obviously) and it sucks of course but my main concern right now is the period that follows after we've tried. The last 3 months that I've gotten it following the insemination they've been TERRIBLE. Bad cramps, bleeding a bit more than regularly, and just overall moodiness.. Has anyone that's been trying without success for awhile experienced this as well? If this time doesn't take, I'm going to go back to the doctor and see what's going on but I'm just curious. Also, any other advice or success tips? Thanks so much!