Yeast infection came and went on its own...4 weeks later sudden UTI with urine in blood. Easy bruising/unexplained weightloss. Leukemia?

Dont jump conclusion. See you primary care doctor or midlevel provided for the bruising and weight loss issue. There are many possible reasons, though leukemia is very uncommon it is one of those reasons.
Not sure... History suggests your overall defense ability is not strong, and usually related with personal lifestyle with overindulgence and obsession. So, it would be most advisable for you to seek a knowledgeable professional. But be sure to prepare and keep an open mind to hear what you need to hear, not just what you life to hear, and work with the attending doctor closely. Best.