Yes I think it's possible that you have systemic candida. There is a blood test that checks IGA, IGG and IGM. You can ask your dr for this test.
My primary care physician was reluctant to order this test for me, but I pressed her on the issue. It came back positive and she treated me for it. It turns out her partner is more open to the candida issue and explained treatment to her, diet, diflucan and probiotics etc.