confusion at its finest

I am so excited/terrified/ don't believe it's real. We lost our first pregnancy at 20+5 on Father's Day this year. Thursday the 2nd would have been his original due date. I am so mixed with emotions. It's been a really hard week knowing what would have been. But also excited that we were able to conceive after just 1 month of really trying(with vitamins and opk). I was truly terrified that I wasn't going to be able to get pregnant again not for any perticular reason but just the fear. I am 4 weeks today and af wasn't suppose to show up till Thursday. I tested from 7 dpo-10dpo and 7 got a negative and very faint for 8-9 and 10 is the picture. I have my first prenatal appointment tomorrow but haven't told my so yet. I just really want to make sure I am before I get him excited. Any similar stories with success? Ways to calm my nerves? Any words of encouragement out there? Thanks in advance