Negative Pregnancy Test

I took a pregnant test this morning. I'm 8dpt5dt. I only did 1 fresh embryo transferred. This embryo was a 4BA. I froze the other one. I only had two embryos that made it to the blastocyst. This is my last try to having babies and I'm scared. 2 years ago we did this and we put 2 in and one of them split and we ended up with triplets and I had them at 25 weeks and they lived for about 2 weeks. That's why we only did 1 this time. This transfer I didnt get implantation bleeding and I have no symptoms but I have my beta Monday September 9th and I'm pretty sure its negative bc I just have a feeling and I'm trying to stay positive.