Doing IVF treatment as a 21 year old ex-cancer patient

Hello! I wanted to hear people’s perspective, specifically those who have done IVF as cancer patients or as non cancer patients.

I had cancer when I was 16 and now I’m 21 about to do IVF. Egg freezing was offered to me as a 15 year old before my cancer treatment but as a teenager I got scared because of the “no sedation” situation and therefore refused the treatment. Now I am 21 and regret refusing it since I have way less of an egg count compared to pre-treatment

I did a vaginal ultrasound and it was pretty traumatic so I’d like to know how you managed that , because apparently there’s many of those to come when I start my cycle. And how was getting the actual procedure done because I heard that it’s like the ultrasound except they puncture you with a needle. I am so terrified. Yes it sounds silly I did a year of cancer treatments and surgeries but now I’m scared of this haha.