Horrible lumps and pain from PIO shots

Mkmt
Anyone have any tips? This isn't my first IVF rodeo, (6th time) so I know PIO shots are horrible but for some reason this time is even worse, maybe it's the blood thinner I'm on as well but I have hot, painful, bruised lumps on both hips/butt that just aren't going away. 
I'm 5.5 weeks - first ultrasound is at 6 weeks. This time last year I M/C at 5.5 weeks so I'm an absolute wreck right now and this constant pain isn't helping. 
I've officially run out of un-injured real estate so every shot going in is awful.