Should I get a blood test?

Kelsey • Wife 👩‍❤️‍💋‍👨 Dog mom 🐶 TTC baby #1 w/ PCOS

So I missed my period last month. Just totally skipped it. All tests have been negative. I ovulated on the 18th. We BD for 3 days. So technically I’m 8dpo. My nipples have been sore, and today I woke up and my boobs are sore. I took a test and it was negative. Should I just go get a blood test?. Since I skipped my period I don’t know when it’s going to come. It was due the 29th of last month. Btw I’ve never missed a whole period in my life. If I go get a blood test will they be able to tell if I’m 8dpo?? I have so many questions!!! Helllppp 😞😞