High blood platelet reading been on iron tabs since november anemia due to heavy bleeding from fibroids and tp?

what could be the cause of high blood platlets, i was diagnosed in november with anemia i also take norithresone to stop bleeding, I also have b12 deficiency was 119 after 2 months of meds it is now 247 still below border line, i also have fibroids growing within the wall of my womb,the dr has told me she will contact the haemotologist for advice, any answers u can give me thanks, anet