baby blues normal after getting preggers after MC?

Hi, I'm a little over 8 weeks pregnant with baby number 2. We lost our first one 9 months ago (I was 6.2 weeks) and we were going to start the <a href="https://glowing.com/glow-fertility-program">IVF</a> process once my period came. A week later I found out I was pregnant. I'm excited in a ways but don't want to get too excited since I was devastated for several months after my MC. I'm scared of going through all that again and I'm scared since my excitement has seem to fade and I can't stop thinking about the one I lost and how this pregnancy feels so different. I'm not sad all the time. I tend to feel more sad in the evenings and this makes me really nervous since I was depressed in my teens and I don't know how to deal with all these feelings inside. I want to be happy and positive. Anybody feel this way? Advice?