Am I [17M] being soft-ghosted?

Hi everyone, first of all, yeah I’m a lonely teenager bored in quarantine who misses being in a relationship. An actual one, heh.

So, she [16F] and I have been talking for 5 days only, and everything until the 4th day has been going great. Just texting though, since well, I still can’t leave my house. So in 3 out of 4 days I’ve been the one to hit her up after the “good night” texts, and only once did she do it (3rd day).

So when I hit her up on the 4th day, she starts unusually slow and doesn’t text as much. I’m guessing yeah, maybe she is just busy or whatever. So then she goes about an hour about an hour without answering, which had not happened before, and says she was playing Counter Strike with her brother, despite her steam account saying that she has literally only .2 hours played in total, and the game I’m talking about isn’t even Counter Strike. So my guess is maybe she is not playing in her steam account or whatever, since it’s a new one. So the day continues, I still keep on texting, she starts getting really stale with her texts, not saying “You?” or something similar when I ask her something, and then suddenly she just likes my message and stops messaging.

So I figure that well, maybe she is just having a rough day. Keep in mind the day before this one, we had our best day as of yet, and she got really open, flirty and what-not, so this comes off as unexpected. I like to think that I haven’t done anything wrong, since I’ve been the same as always and never said something wrong. So that night (yesterday), some hours after she left me on seen and the “liked” message, I text her good night at the hour I know she likes to go to sleep. I wake up to find her “liked message” once more, and I’m kinda scared to just hit her up now, thinking the convo will be the same one as yesterday. Any thoughts on this?

p.s: I know maybe it is a bit too early to start jumping into conclusions, but it just seems really sudden compared to the other days. I haven’t really had much luck in dating, just having one “kids” relationship back in 8th grade and an actual relationship at 11th grade.

Thanks in advance!