With all three of my pg that I had noticeable sickness with - it would come and go. I'd feel ok for a few days and then bad for a few days. My other two pregnancies, now that I think about it, I also had off and on symptoms with them but it was more things like feeling dizzy and having to pee more. The breast pain I only get at first like the first 6 weeks and then it always went away after that.
That's how I was with my pg at 41/42 every time I went to the bathroom I'd take a deep breath and mentally prepare because I was just so sure it would be that time - IKYKWIM. Even right to the end of the pregnancy. Hang in there - until you hear bad news, no news is good news. :)