2 chemical pregnancies in a row?

Ma
I lost the first one in March at 4 weeks 6 days and this one yesterday at 4 weeks 5 days. Why does this keep happening to me? I'm only 21. I have an OB appointment on Monday. I feel like the excitement and joy of pregnancy has been robbed from me :( this is the worst thing I've ever been through. I just needed to vent. Any words of advice or kindness would be gratefully appreciated.