Hello Mag. If you have tried all the different types of progesterone and are unable to take any then there is the option to use oestrogen alone and have regular scans to ensure the lining of the womb does not thicken. Perhaps that is something you would like to try.
I believe this is practised in the US for women with extreme progesterone intolerance using a Menostar patch which is about 16mcg? Obviously they all have scans and a gynaecologist.
If you did this using one pump of gel over a long period of time, you would get womb lining build up and you will probably bleed.
I think Utrogestan is terrible stuff and I can't go anywhere near it. I now I use a brilliant progesterone gel @ 50mg every day with zero side effects along with one pump of Oestrogel. The problem is I buy it in Spain so that is not much help to you but it does at least offer the hope of a viable alternative.
In your situation, I would source a transdermal progesterone cream and take 50 mg every day. If you take a look in the Alternative Therapies section on here, you will see threads on compounded hormones and Biovea progesterone cream etc which is very similar to my Spanish gel.
Important point, my progesterone gel is not licensed for use as part of an HRT regime and in theory, it should not work on the womb lining but it does work extremely well and my last scan was below the 5mm danger line - anything over 5mm is very high risk on a continuous combined regime or immediately post bleed on a cyclical regime.
You will need regular scans which is a good thing because it checks on ovaries, bladder etc. .
PS: Sorry, I forgot to say yes you can take 7 x 100mg Utrogestan vaginally every month but it will mean bleeding which gets pretty intolerable as you get older.
One year when I was really struggling with Utrogestan I took just 20 x100mg over the entire 12 months. I used to bleed automatically when the womb lining hit 7mm ish but it was horrible. Womb lining measurement was still within range posts bleed but the bleeding was repulsive and I would not recommend it.