The site you have linked is just another one of those dodgy alternative therapy sites I'm afraid. If you check the information on it, it is run by a herbalist (not a medical doctor) whose raison d'être is to sell you stuff. It is not a legitimate medical site and should not be offering hormonal treatment, but that's the joys of the internet.
Have you been using a progesterone cream, along with estrogen, previous to all this? The progesterone creams are all compounded, and are not regulated or conventional HRT. If you have a uterus, and especially if you are using estrogen, you should never be using a progesterone cream, because there are no studies proving its effectiveness in opposing estrogen, meaning the lining could build up and eventually cause cancer. Considering your issues a progesterone cream is something you should definitely NOT be using.
The only options that should be used are micronised progesterone (ie Utrogestan or Prometrium) or one of the synthetic progestogens (ie norethisterone, medroxyprogesterone etc) or maybe a Mirena.
Primulot contains norethisterone, and from what I have gathered, women in your situation are usually prescribed norethisterone to do a good clean out. The micronised progesterone (Utrogestan/Prometrium) may not be strong enough to solve this initial issue, but may be okay to use once you have everything sorted out, but you would need to monitor it closely if you are prone to this problem.