The last Trimister is one of the reasons for your less sleeping hours..
Also, post Covid, you could have developed some Anxiety, which could also be one another reason for it..
For a more personalised understanding and clarity, I suggest you to consult a psychological Counselor..
Health Tips
You can reach me by using the link given below for more details :-
https://prac.to/hema-sampath-psychologist-dir