Feeling like a failure😭😢

This was my first medicated cycle, took clomid 50mg, had around 5 beautiful follicules and got triggered at cd13. Ovulated on cd 14 and did the bd from cd 13 to 15. Husband s results were good too. I dont know why we couldnt this cycle. I just did my beta hcg at 13dpo, my level is 0.5ui so neg. Does anyone know why my level is this low? Is it normal even if not prego?

Feeling so defeated. Lot of money spent, stressful life and lots of sleepless nights. I guess i just hv to give up ttc.😭😭😭