Sometimes when you bump a post you will make it take longer for me to answer, since I go from oldest to newest and bumping makes it go to top of rotation.
I'd wait a week before bumping
Do not, I repeat DO NOT go back on vitex or start Pregnitude.
You do not need to toss everything out the window, we just need to GRADUALLY start turning the dial back the opposite direction. Do not worry that you'll sway blue doing this. If you do it gradually, you'll have time to adjust. The people who end up swaying blue are those who get where you are and totally give up.
I want you at 1800-2000 cals, 50-60 g protein, 50-60 g fat. I want you eating the full fat dairy every day, 4-6 eggs a week, and BOTH 1 serv. salmon and 1 serv. red meat a week (don't count the meat in your protein totals) If you need to add in a meal to do this, fine. 4 meals is still ok. But don't be snacking every 15 min. all day long. Exercise at 4 days a week. Be sure you're getting plenty of sleep. Drop fiber. I think switching to one of the alt. diets will make even more weight come off and I'd not want to remove the empty carbs totally, you do not have PCO tendencies, you have gone the other direction and do not need to lower your hormones any more, they're low enough!
I suspect this is a temporary bump in the road and may already be better by next month.
5 DPO is too early for implantation anyway, and the cramping feeling does NOT come from the fertilized egg touching your uterus, it comes after the baby is already nestled in and your body starts sending tons of blood supply and hormones to the area to sustain a pregnancy.
How sure are you about when you ovulated.