How to overcome social anxiety

So I have quite a few things going on in the next week or two and it’s triggered my social anxiety big time. First of all I’m going for a walk in the park with my cousin and her little one and my baby girl. I haven’t seen my cousin in a while and for some reason I’m feeling a little anxiety towards our walk, then Thursday night my son is performing a dance at his school which I will be attending and I have anxiety toward that, then my son has a birthday party to attend Saturday morning and I have anxiety toward dropping him off and having to talk to the parents, then Sunday we’re going to a surprise party for a friend and I have anxiety toward that since I’ll have to meet a ton of people I don’t know, and then lastly Halloween is next week and I need to contact some parents so that my son has somebody to trick or treat with. I have anxiety toward contacting other parents and then having to make small talk on Halloween. What the heck, I never used to me this way. Before I had kids I was so social and loved meeting new people. It’s like my social skills have decreased since my son was born 7 years ago. My daughter is 3 months old and it hasn’t gotten any better. Is there any way to overcome this? Am I the only one who feels anxious in social settings? I’m not an awkward person to talk to but I get so much anxiety built up when I know I need to be social.