@jane Schofield Sorry you're feeling down. Diabetes can be very wearing. My tip,is to take one day at a time and just do the best you can for that day.
Back to pumps. I don't have an Omnipod but I do have an Animas Vibe pump. I have sensitive skin but I haven't had any issues with itchy rashes or irritation from the sets that you stick to your skin.
I think it would be worth speaking to your DSN or GP and see if they can prescribe something to help. You shouldn't have to put up with feeling so uncomfortable. Don't let them Palm you off. Explain how irritating the itchiness is and ask for help. Sometimes we have to be a little pushy to get the support we need, so never be nervous about politely pushing a tiny bit more.