Girls, I last had my bloodwork done last month. Everything was always …

Girls, I last had my bloodwork done last month. Everything was always normal. Today the gynecologist herself called and said to come back tomorrow for another blood test. Is it a problem if I don't go? And besides, it's not about money, of course, but the hospital is state-run and I have insurance, but still, everything is paid in our country. ?And I think that's exactly why they're asking me The problem is that I moved far from that hospital, and tomorrow I need to buy groceries for my child. I can't make it on time and I get tired quickly??