Pregnant and sad

So I officially found out I’m pregnant with baby number two and while we’ve been trying for a couple of months I couldn’t help but cry last night because my little boy that we tried for so hard how to take medication for won’t be my little baby anymore. I’m so happy that we could get pregnant again but I’m also Said that I don’t ever want him to think that mommy doesn’t love her little boy because now she’s got a baby please tell me this is normal because I feel horrible that I’m even thinking this and taking away from the excitement of getting pregnant