She's trying too hard?

so I've been dating a girl and it's been going great. We hit it off, it flows naturally and we are comfortable woth eachother. However, since yesterday she has changed. I've felt a different vibe from her. We have been told we can't see eachother because our counties are limiting contact because of covid-19. So we chat on ohine and message. Yesterday she had a traumatic day and I put it down to that. She even told me last night she felt we are 'weird'
today has been pretty much the same, she seems almost like she is trying too hard? She tells me how much she likes, how great I am, loves everything about me, she's still ringing me up, telling me about her day etc, but it feels instead of flowing more like its forced?
this has in itself made me feel like she's going off me and I've started to overthink everything she is saying. I've not told her any of this as I don't want to come across weak. I'm still being my normal self and just going along with it. I'm hoping she will go back to herself.
what are the reasons she would be like this? Surely if she was going off me, she wouldn't message constant or tell me how much I mean to her etc?
She's trying too hard?
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