Grrr - I was halfway through typing a big reply when my computer decided it was time to update itself and booted me out.
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I had 450 iu, too, Banana - I'm guessing you're an "old bird" like me
- I was 41 when I was last stimming.
Cuppa. The jabs aren't nearly as bad in reality as you think they'll be. My clinic got me to do one with an empty needle during my last consultation and that took all the fear out of it a) because they were there to confirm I was doing it right and b) because it really didn't hurt at all.
You can use some ice to numb the site if you want to (I found I didn't need to bother though, because it really doesn't hurt). You might need to move the site around your belly so you don't always inject into the same spot, as that can bruise and then it's a little bit sore. For me, the most comfortable place was to the side, about 3 inches either side of my belly button. Pinch a bit of tummy fat/skin - if you pinch quite hard, you feel the pinch rather than the needle. I always counted myself in - "1,2,3 " - and I needed to psych myself up this way even when I'd done it over 100 times and I KNEW it didn't hurt!
You'll be fine. It's just a psychological thing because you're doing it to yourself and you know when it's going to happen. But I found it helped to be fiercely logical about it: "if this works, I'm going to have a baby at the end of it all, and that's going to hurt a WHOLE lot more, but I'm happily volunteering for that. So what's a tiny pinprick to worry about?" 