Is it ok for morning sickness to be drastically/suddenly reduced?

at eight weeks? I've been having absolutely horrendous all day sickness for the last 4 weeks or so (I'm eight weeks one day) but today it started off with feeling a bit queasy in the morning, then after I ate some fruit when I started work at about 1.30pm this afternoon I've gradually been feeling better all day, to the point where I feel quite good now. Is this ok, I have heard that a sudden disappearance of sickness can mean something isn't right? Sorry if this seems a stupid question, this is my first baby, and I don't know what to expect. Thanks in advance.