@Jen74 - I'd tend to agree with
@luceeloo that your surgery will likely be having and impact on those blood scores. Other factors could be reduced exercise/mobility, poor sleep, stress.
How long ago was your surgery, and was it considered minor or major? Of course, for me, any surgery is a big thing, but just trying to gauge how long your recovery period could be expected to be.
When I had some surgery a couple of years ago, my bloods didn't go up a lot, but they did go up - especially when I was dealing with a slightly unfortunate complication of the surgery, but it all came back into line.
I don't know if you have changed your diet at all in this period, but I certainly tried to eat particularly well during my period leading to and after my surgery to try to achieve the best outcome in terms on healing and so on.