Insulin pump simply not working anymore and I don't know what to do

Hi friends,
I have Type 1 diabetes and have been using an Accu-chek Spirit for over 10 years now I think, and it has really helped me. I used to have seizures at night because of hipos and thanks to the pump, it has never again happened to me.
But on the last few months I started noticing many of my infusion sites were lasting only a day or two before my blood levels would spike. On the last few days it has turned much worse, with most of my tries apparently never even being "right" to begin with. I have done this for so long and it seems quite improbable to me that I'd miss so much in a row, I believe it's over 8 tries now, with all of them being bad. I decided to, while I keep trying, use a normal pen to keep my blood levels down - otherwise my sugar levels would be over 400 for the last day or two.
This is stressing the shit out of me, specially since I am suspected to have the coronavirus and high blood levels fuck up the immune system. I don't know what to do anymore, going back to Lantus is not an option cause I live alone and if I get a seizure at night I'm fucked, but not being able to control my blood levels is also terrible. To make matters even worse I recently moved and do not have an endocrinologist following me up yet. Could it be I developed some kind of resistance to the pump's infusion set? Does anyone have similar experiences and could shine some light into what I should do?