Because I don't know you personally, and what works for your personality, I'm going to share what I experienced in a similar situation, and some ideas for enjoying this pregnancy.
I myself had a history of miscarriage; two with the exhusband, and one right before my husband and I became pregnant with our son. In fact, I discovered I was pregnant about 5-6 weeks after that last miscarriage. Shocker!
With my history, it would have been easy to white-knuckle my pregnancy with my son. Early on, I made a concious decision: being stressed and nervous hadn't helped, nor prevented what was inevitable, so I was going to enjoy this pregnancy, for however long it lasted. Part of this decision was also based on the fact that I'd heard all the horror stories, and knew there were no guarantees for perfect outcomes, no matter which week the child had grown to.
There are reassuring statistics, of course, but ultimately, even after our children are born, we still run a risk of loss that is intrinsically entwined with their being alive. This shouldn't stop us from enjoying our children, and this hopefully won't keep you from enjoying your pregnancy.
Some things that helped: to experience the sad feelings of previous losses as they came up, and to let them go. To focus on beautiful things in the world, to close my eyes with that image and "send" it to my baby. To let go of expectations about what I "should" have been feeling in the way of bonding with my developing child, and to just live and know that the 'right' feelings would come when they did.
In short, to give myself a break for not being perfect, to put the baggage in its proper context (the past, not the future) and to just be.
Some people find letting-go rituals remarkably helpful. Usually this involves either writing or drawing about our fears, our thoughts, feelings-- the spiritual burdens (worries) that we want to let go of, or the hopes we have-- and then, to transform or release those thoughts through either burning the paper we've put them on, or folding it up into a paper boat and release it on the water, watching it sail away.
After the miscarriage of my second little one, my ex-husband and I went to a hidden creek in a forested park and blew bubbles to float down the water, over little sticks and rocks. This was how we released the hope of that child, knowing it wasn't to be. It was a sweet moment.
Of course, these rituals are for the living, so that we can keep going even when we face these horrible times and to give some meaning and context for these tremendously sad and challenging moments.
I hope that, in the next few days, you find space in your heart and mind to enjoy the positive moments and to move past that challenging space of renewed --but unguaranteed-- possibility. And I hope this wasn't too "woo woo"-- I'm not a 'woo woo' person, by any means, but there's no healing the spiritual anxiety and wounds without addressing them spiritually. If you have another practice in your faith (prayer, meditiation...either of these can be incorporated in what I suggested before) that centers and renews you, focusing on that too can be very helpful. And even if you aren't a person of faith, the tactile actions of burning/releasing those anxieties can still help.
Best wishes,
H.