Zoloft question

I was on Zoloft (sertaline) before I got pregnant. I stopped taking it while preg. And I got put back on it for ppd.

I’m on 50mg and I take it in the morning. Every night I have started to notice I will feel “out of my own body” in a sense. And it’s around 9p-10p. I can hear everything (I know that Normal but it’s like hearing myself talk after I’ve already said something), every thing is a lot louder, I get really queasy and feel like I’m gonna TMI poop myself, my heart is fast then slow then fast again, and I get shaky and my head/neck feel so heavy.

Can anyone tell me what is happening?