Yes there are some things you would want to check to see if they are in the normal range.
For hormones:
TSH - thyroid
E2 - oestradiol
LH/FSH - they may also call this gonadotrophins
Progesterone
Your doctor may want you to have these tested at a certain time during your menstral cycle.
If your cycle was oral steroids, you defo need to get a liver function test (LFT), and other general screening tests are U/E (urea and electrolytes) and a FBC/CBC - full blood count/complete blood count
Ok you are in Belgium, sprekken het nederlands ook? Sorry, my flemish is rubbish.
What are the doctors etc like there?
You may also get tested for a few other things if you tell your doctor what you have been taking, it does depend on your relationship with him, there may be a few legal things you may want to check out as well if your medical records can be released.
If you have to be a bit more secretive, I can tell you what to say your symptoms are to get these tests