Endometriosis always lead to uterine fibroids. Fibroids are growths that occur in the wall of the uterus. They are usually benign, or noncancerous. They can cause symptoms such as heavy menstrual bleeding and abdominal pain, as well as cramps, after sex. So the pain is due to that only.
If you are undergoing just ovulation induction treatment you in fact don't need any medication for luteal phase support like duphaston. Duphaston is a type of progesterone that is required to be given only in cases of some iui and ivf treatment cycles. If you are trying to conceive naturally or have received only ovulation inducing drugs you don't need to take any duphaston. Try to have regular intercourse at the time near to ovulation.
you are confused about hormones. it looks like you're talking double the dose in different brands . consult your doctor again. details of hormonal imbalances and reasons for this can't be explained here in details.
One gets bleeding 3 to 8 days after stopping tablets if there is no pregnancy or other hormonal problem.
You may meet gynecologist or wait and if do not get bleeding get tests done for pregnancy or meet gynecologist.
Dinofirst contains dienogest and is given to patients suffering from endometriosis.
Femilon is an orsl contraceptive pill.
These two tablets are not taken together either of the two tablets are to be taken when a doctor prescribes them.
Any couple desirous of pregnancy and not getting same naturally must meet gynecologist or infertility specialist accepting facts that it needs many reports and different trials of treatment. Means couple must have patience and go to one in whom they have trust to stick for a long time.