Feeling ridiculous...

I'm about 6 weeks along, and am just already feeling so defeated. After three losses, it's just really hard to get excited about this pregnancy. I feel like I'm taking myself out of it. My betas were good, and I do have some symptoms (fatigue, nausea, sore nipples, etc) but I can explain them all away. I'm just feeling discouraged. It's like I don't want to get my hopes up again so I'm not believing that I'm pregnant.