Is it normal to miss your ex from a year ago?

I'm pregnant, I'm emotional, and I can't stop thinking about my ex and how much I miss him. I looked at his instagram which I know I shouldn't do but just seeing his face gives me a little high. I remember all the good times with him and it's like I forget why we even broke up! I won't ever find a love like him and I want him back so bad but I know i never will. If he gets a new girlfriend I would be heartbroken which is rich coming from me, the girl who is now carrying another mans child, but I can't help how I feel. I really love him and I don't think it ever went away to be honest and all I can wish is that this was his baby and we were still together. I've even dreamt of him which I hadn't done since we broke up a year ago. In my dreams he tells me he still loves me and he misses me. Is this normal pregnancy emotion? 😭💔💔💔💔