Period is to start today

My period is to start today or with in the next 2 days. I haven't taken a test. Tho I have had a blood test last week. Waiting for that to come back. Talking with my Dr on why we haven't been able to get pregnant after a miscarriage so that's why I had a blood test. Trying not to test yet I've been constipated, which I've never had. I'm very bloated usually my boobs kill right before af. And I haven't had that much pain but I do have some pain. I just seriously want this month to be the month so I'm not testing don't want that negative to show. I've also have had back pain!