Feeling down

i thought I had been doing so much better with everything, I lost some weight, it’s a little up this morning, I am exercising better, I am doing more with my mental health. My diabetes blood glucose check is slughtly elevated at 7.5mmol this morning. I didn’t eat well yesterday so get why it’s up. I am doing some courses, my results have been reasonably good, but my last assignments have been 100%, 95% and 95%, my mum (yes I know, at my age it shouldn’t matter but she’s spiteful) wasn’t happy with the outcome of the 2nd one and expects me to pull 100% (this last one was Shakespeare which is something I used to love). I am worried about the outcome of PIP and ESA , in the last 2 years I have tried ti get back into work but I can’t keep it going without my pain getting too high and I had a mental breaKdown last time I worked.
sorry to carp on, I feel so down.