so here's my story: need advice ladies

Long story short. We decided to start our family. 9 months later our son was born. When he was 18 months we got pregnant again. I obsessed over wanting a girl. 9 months later she was born lol. Now we have our boy and girl but I can't help but feel as though I'd love another. Financially I'm really hesitant about it. I'm not saving anything so I'd have to start over. Another pregnancy would be risky for me and the baby but is totally possible with lots of monitoring. Should I count my blessings and be happy or should I try for another? I'm worried about a risky pregnancy. I mean any pregnancy can go south at anytime. At least I'd have a specialist right off the hop. Thoughts anyone??