having a baby

so I have taken a test today and it's a faint line not sure either way, anyway idk if I want to be pregnant. I lost a baby in jan at 18 weeks and it nearly killed me (literally and emotionally) I love the idea of having a new baby but the paranoia of losing him or her would actually be the death of me. I have a 1yo and i am constantly paranoid I'm going to lose him and it's so irritating. any advice would be appreciated, also I have a daughter whose a tad older and I don't have the same fear as much, I've been very very protective over her since day 1 but I'm not constantly checking on her while she's asleep. thanks