To hire or not to hire?

Hey guys! I am stuck again. I have been having a lot of trouble with vendors not responding to me and I need advice on this particular one. I messaged a hair and makeup person about two weeks ago on this app. She responded within a day. I waited about 3 days to respond as it was Memorial Day weekend. This was Monday. She didn’t respond so I contacted her on her Facebook page on Friday since my wedding is only 3 months away and I want to lock someone in for the job. She never responded to that either. She finally responded on this app Friday almost two full weeks since I messaged her. And has since answered two questions today. I am just nervous since I’ve had so many problems with people not responding. I’m worried about her being flaky or not showing up the day of. She was the only person that responded to me about availability that I liked that was under $300 (for hair makeup and trial and travel fee, not including tip). And she does have good reviews, I just think not responding to a potential client for two weeks is a little unprofessional especially since I reached out to her on a different outlet. My mom is worried too but suggested I ask why it took so long to respond in the first place but I don’t know a polite way to do that. Am I overthinking things? I tend to do that haha. Just let me know what you all think!