Is losing sense of smell part of covid 19?

Now I know sometimes when you have a bad cold you can’t really smell, but now as I am eating, I have a different smell. Like I’m losing my sense of smell. It’s like a stale bad smell but not really bad. I can’t smell the food regularly if that makes sense. I’m trying to describe it as much as I can. I can still taste which is good.
I am still congested, have a runny nose but I am feeling a bit better. Don’t have a fever which is good. I got tested positive for covid Saturday night so I’m staying home from work for a couple days.
Also I now have diarrhea. Is it normal for the symptoms to come a couple days later?