Omg what is going on

Lovemylife • Mom to two awesome girls. 1 MC. Had my rainbow baby boy 6/5/2017!!!! So in love 😍
I am 16dpo yes 16dpo cd 35 no sign of af and bfn. I am getting frustrated as I'm dizzy hungry tired nautious and more n no bfp n no af. What is going on? I feel crazy and worried that even if it turns into bfp something is wrong seeing my Hcg isn't high enough for hpt. Anyone been thru this? Thanks