Plz HELP!! How do I tell my bf there's a good chance that I could be pregnant?

Ok so I know the answer seems so obvious but I'm a bit... Challenged when it comes to communicating with people face to face especially when the subject is close to home or would impact the person I'm trying to talk to..... I mean there's times I literally can't find words...like at all just bits and pieces of words actually come out...sometimes completely irrelevant to the conversation often leaving the other person I'm attempting to communicate with frustrated. Witch leaves me embarrassed and on the verge of tears. Even thinking about trying to start a conversation I know will be difficult my chest gets tight...so I'm hoping maybe someone can help me figure out how/when to bring up possibly being pregnant to my boyfriend of almost three years now... We've been best friends for 7. He's 36 I'm 29 and He doesn't have kids never really planned on it, was pretty clear on not wanting kids until about a yr or so ago there's been some things I've noticed that say he may not be as adamantly against it but never plain said he would want to. I have two kids of my own part time and he's great with them always has been but I'm Soo nervous to tell him. I took a pregnancy test while he was at work because I figured it'd be negative and why rock the boat if it was... Thing is Im pretty sure it's positive... Also looking for thoughts on that..lol please help this is huge 😬 sorry for the long post just trying to put as much relivent info as I can so anyone with any advice has a idea of what all is involved feel free to ask me anything that might help I'm seriously on a emotional rollercoaster and nervous as all hell