I do feel like she is pregnant, especially when she was talking about not doing vlogtober for quite random reasoning. In fairness, she doesn’t have to announce it, but the minute she deleted the pregnancy book from goodreads I felt it was likely.
BUT, I do want to say that I feel bad for speculating as well, as 2020 hasn’t been a good year for anyone and she did mention missing the gym, so the extra weight could simply be a lack of exercise too I guess.