Could it be Leukemia with normal bloodwork?

I hope it is okay to post this question here, if not I can take it down or can move it somewhere else. There are not many cancer-related forums or resources for people who do not have a diagnosis.

It is possible to have leukemia-related fatigue, dizziness, nausea, bone/joint pain before it shows up in bloodwork?

I have had fatigue since my teens and I am now 27. It has gotten substantially worse in the last few months and I am once again unable to work because of it, but I have not had anemia until recently and it is only mild and have never had elevated WBC or abnormal platelets. Usually my RBC and hematocrit is high, but in the last 8 months my ferritin has been decreasing.

I have started taking iron supplements recently but am concerned that unless the cause of the anemia is found I am only masking the symptoms.

I am extremely nauseous every morning and it makes it hard to get out of bed. It has been that way since I was a child, especially when waking up early or when I haven't had enough sleep, but now as an adult the nausea has become more severe and happens every morning no matter how much sleep I have gotten. It takes hours to fall sleep even with no screen time hours before bed, I wake frequently due to pain and discomfort in my hips and low back, and never wake feeling refreshed.

In January I started physical therapy for chronic back pain I have had since I was a teen that has recently gotten worse. PT decreases my pain but progress has plateaued. I go twice a week, never miss an appointment and do 20-30 min PT exercises at home almost every day. I have been reasonably fit all my life. Since leaving my last job due to fatigue in February I have been trying to exercise more but despite pushing myself and being consistent I have somehow lost endurance and have become even more tired. It use to be that moderate exercise made me feel short of breath, dizzy, and makes me see spots, now only mild exercise is all it takes.

I have an appointment with the cardiologist next week (I have been waiting months) and my GP refuses to repeat my CBC from January because the anemia is only mild, there was no elevated WBC and does not see the need for a hematological workup. She thinks the cardiologist will get it sorted. I am not so sure. Resting EKG and echo were normal. BP is normal, HR normal but elevated by about 20 beats when going from laying to standing (not enough for a POTS diagnosis, referral for cardio was for dysautonomia workup).

Been to many doctors over the years, tried a billion dietary changes, supplements, and meds, some things have improved but the nausea, and abdominal tenderness, and fatigue remain. CT for abdominal pain in 2022 revealed mild hepatomegaly but was considered insignificant at the time.

The anemia and hepatomegaly may be "mild", but I feel like death and things have been slowly getting worse for years and I have no answers. I know something is wrong but all the tests are coming up negative, not antibodies for autoimmune disorders.

When I look up the diagnostic criteria for leukemia, I fit many of the symptoms. The stories of people with leukemia are similar to my own, especially with the fatigue, and nausea, and being told or thinking it wasn't a big deal or there was nothing wrong. If I have had this for years I don't want to wait until an inconclusive workup with cardio. But if I convince my GP to run another CBC and there is nothing to suggest leukemia or anything else I don't know what to do. I've heard it's possible to still have leukemia with normalish looking bloodwork. If I do have leukemia and my bloodwork is normal then how will I ever get a diagnosis if my doctor won't run the tests??

EDA: forgot to mention memory problems (lol), difficulty concentrating, and brain fog. Memory problems and nausea are partially remediated by compression socks but are still a problem.