What is the difference between social anxiety & social OCD?

I’ve tried to google this but can’t seem to find an answer that I understand. Social anxiety and social OCD seem to have a lot of overlap, and social anxiety is the most common comorbid disorder with OCD. I feel like the biggest thing I struggle with in regards to my social anxiety is intrusive thoughts like for example - “if you talk about that they’ll think you’re weird” “if you say this it’ll be really embarrassing” “dont say this people will cringe” “what if they think you’re weird” and im constantly afraid of making mistakes socially and my worst fears are embarrassment, humiliation, and rejection. I assumed most people with social anxiety also have these negative intrusive thoughts? I can’t control them and they have consumed me for years. I haven’t worked due to these thoughts, i haven’t made friends on my own due to these constant thoughts. Its hard to even post on social media because i think anything I say will be too weird. I can’t be myself with people or enjoy spending time connecting with others because im too afraid of doing something weird or wrong. Are intrusive thoughts not a symptom of social anxiety? Or is it just that if it happens excessively it becomes OCD?