Aw hun, I know what that feels like.
I got married last year while I was still pregnant with my first baby, and I knew at that time that the baby was going to die. It ended up passing away at 15 weeks and I had to go to the hospital and everything. My mini-honeymoon was miserable, looking at all the babies and happy pregnant ladies walking by the beach... Just the saddest time in my life ever. Marriage and honeymoon, waiting for my little one to give up from his fight to live.
I keep telling myself, once I get my baby I am doing all of that all over again and I'm going to be happy!
At this point there is nothing you can do but wait it out saddly. Are you taking progesterone supositories?
You are not a failure and stop punishing yourself by thinking that. What you are going through right now is punishment enough ok?
I managed to survive my wedding by simply focusing on how lucky I was to be marrying my husband, and how lucky I have been because we get along so well. I had a lingering sadness haunt me the whole time, but it made things more tolerable.
I am not saying by any means that this is a lost case. Who knows, maybe your hcg levels seem off from things like lack of hidration, even the acupuncture.
This is my third try, and this time hcg rose slowly too at 5 weeks and a bit, and my ex doctor told me to give up, and my baby is still here, I'll be 18 weeks soon.
Try to step aside from your own mind when you can. Give it some rest.