I have been talking with this girl for the last 2 weeks literally every day and also have been talking a lot in call, sometimes we even passed all the night just talking

At the start I didn’t really know if she just wanted to be friends or if she was interested in a romantic way, some days ago in call she said clearly that she is interested in me and wants to know me more and I honestly just snapped, I said to her that I really liked her, pretty much like confessing

The worst point wasn’t even this, last night I asked her if she wanted to call but she said she wanted to sleep early and at that point I was already overthinking, at the end we still talked via text in the night but I felt like she was less responsive and then I saw her online on WhatsApp and, I don’t even know why, I got jealous and told her if she wasn’t interested anymore she could just says so and also mentioned her online on the other app, at the end I apologized and she said it was all right but I’m not sure

At this point I don’t know what to do, she still writed to me this morning but the chat feels even drier, we had planned a date in a few days ays, but I can’t understand if she really lost interest or if it’s me that is overthinking, should I just close contact and cancel the date?