What should I do?

So a few months ago I texted one girl on IG and we started talking. On the next day she was busy and didn't reply to my text, but m...

So a few months ago I texted one girl on IG and we started talking. On the next day she was busy and didn't reply to my text, but my thoughts ate me from the inside (overthinking) so I've decided to tell her that I need some time for myself and she supported me for it. A few days ago I texted her again and said again sorry for leaving because I needed time for myself. Long story short, I texted her and she replied "how you doing" and from this text she is gone. I've seen a couple times that she was online but she didn't even entered our chat so there's no 'seen' on my text. Should I drop it or maybe try to send another message to check maybe something happened etc?