Going in for a blood test? How long do I have to wait?

No I'm not in any form of birth control. Me and my husband been trying to get pregnant. I had 2 miscarriage in the last 2 years. My last period was august 18. I got another period on September 30 but it wasn't heavy at all, it was light and you only notice it if I wipe you will see it, and it only lasted 2 days. I took test and it was all negative. I'm so tired all the time "my period never last for 2 days or it was that light" anyways yeah I'm so tired all the time. sometime feel sick when I'm near something. I wanna take a blood test to see if I am pregnant. But is this normal about the 2 day spotting? No blood cloths or anything and my cm is a lot creamy. Yesterday I saw a white discharge on my underwear ? 😔😔😔😔 I just want my baby