Potential Single Mom

I’m 10 weeks pregnant, I heard the heartbeat for the first time yesterday but my pregnancy is with someone I used to be in love with and things aren’t the same. I’m scared I’m going to be a single mom and I’m embarrassed to tell my friends and family so I’m bottling it up and I don’t want it to turn into postpartum depression as I already suffered from depression for years. Any advice on preventing negative emotions and trying to keep positive energy in my life as I develop a new life inside of me?