I’ve started talking to a girl and I thought it was going well

So I've been talking to this girl the past few days and it's almost definitely too early to tell but I thought we were really clicking and out of nowhere she just stopped responding. It has only been 5 hours but like idk she had been actually engaged in the conversation and we were talking but am I just completely overreacting? She was with family yesterday but she's home now so idk i just feel stupid, normally I text her in the morning but with her not saying anything I dont want to just be obnoxious