History Of Heart Problems And Chemo. Diabetic Patient. Sugar Count Increases Rapidly. What To Do?

Question : I have been hospitalized 5 times since May 2013, both for heart stints and for hysterectomy and chemo port. I am also Type 2 diabetic and on 500 mg glip/metformin. I went to the heart doctor yesterday at the direction of my oncologist, telling him I was having chest pains, shoulder pains, and breathlessness. He said my heart sounded good, but since my blood pressure was way out of control, it had to be the hpb that was causing my problems. He prescribed Ranex 500 mg for the hpb and Triamterene/HCTZ 37.5 mg/25 mg for water retention. He released me to have my chemo treatment today (taxol and carboplatin). My blood count at the chemo place was in the "low normal" range, they told me. I took my blood sugar count this afternoon about 2:00 when I got home, and it was 218. About 3:00 it was 235, Then I took another glyb/metformin about 5:00 because it had gone up to 286. I'm only supposed to take one of those 2 times a day and that was 3. I called all my doctors, got their answering service, was told that they don't take messages, then called my local emergency room and asked if I should come visit them. They said they can't tell me anything over the phone, that if I feel I need to go the emergency room, then go. If not, don't go. I've been keeping hydrated and have not eaten anything since noon , I'm afraid to. What should I do? Is 286 (or probably higher now) XXXXXXX for me?