Pregnancy sadness needing advice

I am 8 weeks pregnant and I hope I don’t sound like I’m whining or complaining, but I hate when my husband goes back to work after the weekend is over. I tend to feel anxious and cry when he leaves. He makes me feel safe and comfortable. I have a spinal cord injury and I am unable to walk or do much on my own without a walker or wheelchair. I hurt my back badly in April and now I have to have home physical therapy. I’m getting better but I still need assistance with daily task. I have 2 herniated disc with both compressed sciatic nerves in both legs which the right side is weaker. My husband and I have a very good relationship and when he leaves I miss him and feel stressed as I also suffer from bipolar 2 depression and generalized anxiety disorder which I’m on medication for but unfortunately I don’t see my psychiatrist and therapist until next week. It’s just when my husband leaves I start to worry about my pregnancy going wrong, or just things that make me sad I feel lonely. Before pregnancy and when I could walk in my own it wasn’t so hard. My mother, sister and dad have passed on, my dad in 2016, mom 2020 and sister in 2021. My older brother is still alive and well but we don’t talk much because of his work schedule and I don’t want to burden him or anyone else with my emotional issues. Is there anything I can do to combat this sadness? I thought it would be good when I heard my baby’s heartbeat but I’m even more worried because I’m hypertensive (controlled) but I’m now worried about developing preeclampsia it is like I can’t escape worry! Is there anyone that has felt this way? Or knows what I can do to relax?