I am so sorry this happened to you and the loss of your lovely son. It is so unfair.
I had still born twins , we were casually trying to concieve for a couple of years and it was my first pregnancy and was quite relaxed about the whole thing. After they died I was consumed with trying for another baby and was very honest with my husband about my utter desperation. We were not in a good place mentally but honestly focusing on getting pregnant I think did help me cope. We used the sperm meets egg plan and used conceive plus, as I wanted to maximise the chances. Being honest, we had some very sad and functional sex but it did the trick and I got pregnant 3 months after my twins died.
Due to the stillbirth I had lots of monitoring from the hospital. They were fab, extra scans, lots of time to ask questions. That made things much easier. I never enjoyed the pregnancy. I could not think about a live baby so did not buy any baby gear and did not go to any antenatal classes, didn't talk to many people about the pregnancy. It was a very stressful time but I felt so much better being pregnant as I had hope again and a focus and I don't think giving myself more time after the twins death would have made the pregnancy any easier emotionally or mentally.
I had a relatively normal pregnancy, I wanted to be induced so had a very medicalised birth with loads of doctors, all scanning and poking me constantly, watching the monitoring machine, which I know sounds awful for many but really reassured me that everyone was on my side doing their best. I had the same midwife (by coincidence) that delivered my twins which was sad and lovely all at the same time, she was really rooting for me and my baby).
I am now the very happy owner of a lovely healthy child! Everyday I think of my twins and I am leaning to live with the sadness, anger and utter loss of them. I am much more anxious about things, especially about my child but I am also more grateful, I waste less time and have more patience with my child than I think I would have if I had not experienced such a loss.
I have no guilt about not enjoying my pregnancy. I bought baby stuff after baby was born and bonded great.
I think it will be terrifying for you, be honest about this, tell your family and the medical staff if/when you get pregnant and they will understand. Don't put any pressure on yourself to enjoy it, just do what you need to do to get through it. I hope some of my ramble is helpful.