T., time will tell for finding out if you are pregnant by using a pregnancy test. I hope for you that you are pregnant. If you aren't, it is time to make an appointment with your OB/GYN and ask for an Estradiol and FSH test to help identify if you are in the beginnings of menopause. The doctor may want to wait until you've missed periods for 6 months or so, but it's a good thing to ask for.
Even in peri-menopause, we can still release an egg - nipples get sore, you can have cramps, even little cysts on the ovaries from releasing an egg (ovulating). What you are describing doesn't have to be pregnancy related, but more hormonally related, or part of a little viral thing going on. I doubt that you're "making anything up", as you say, - but trying to put 2's and 2's together hoping for what you greatly desire.
It's so hard, I know. But work with the doctor to understand your body. It is better to do that than to feel that you're whipped around from side to side emotionally over this. I feel for you, I really do. Getting older like us (I'm 50 so I really get this) is so hard when we start having all these change of life issues.
All my best,