Yes it can happen. All my pregnancies (currently expecting my 3rd) I felt certain feelings and have thoughts on and off. It can happen, due to hormones and also sometimes the anxiety of being pregnant, expecting a child, or trying to juggle several things happening at once. Though it can be common, I wouldn’t just take it lightly and let it be. Speak to someone about it, your close friend, spouse (if he is largely around and supportive), family, and your gynae. My gynae would check in at every appt to make sure I was ok, recommended activities to take the thoughts out of me, as she did mention it could be the onset or lead to prenatal depression.
I felt this way before too.. even felt suspicious too. Find someone (eg friends of family) that you trust to share this feeling or do something light that you like eg: listen to music or read books to ease off this negative feeling.