Advice Needed

Alli
Hi!!
I'm 25 and have been TTC for about 9 months. I had a miscarriage in 2015 and stopped trying to get over that loss, we started trying again and I had a miscarriage again a month ago...
My GP has now referred me for tests, due to my age and having recurring miscarriages, but I'm anxious as to what these tests are, as I have an awful needle phobia!!
Can anyone please let me know if they've had these tests and what they involve?
Thank you xx