Does anyone else only stutter on certain letters?

Does anyone else only stutter on certain letters? And only in the start of a sentence too. Like for example, I find it really tough to start a conversation with the letters W and D. And randomly other letters too. It's like if I think about what I'm about to say for more than 4 seconds, it's way harder to get it out. I can't just blurt things out as i think them. And to make things worse, I like this girl, and I want to get her number but I literally can't even ask her. Do any of you guys have tips to just say things, and not over think them, or just to stop stuttering? Thanks in advance.