somehow women have the ability of their bodies feeling and acting pregnant without actually being pregnant.
Want to address this too - that is definitely possible, if you are strongly hoping or strongly fearing being pregnant... When TTGP lots and lots of women have every symptom in the book except a positive pregnancy test, as do many fearful teenagers who've had an "oops" but are still waiting until it's time to test. I know I can feel certain I'm pregnant and not be! Many of my friends have experienced this too, so I'm confident that symptoms alone don't mean much.
Having lots of symptoms without being pregnant doesn't mean you're "faking" or anything; it just means that you're so focused on one outcome that you noticed unrelated stuff (like normal PMS breast tenderness or a minor stomach bug) and then attributed it to your desired result, a pregnancy. You really truly *felt* all those things, but they weren't necessarily the proof of a pregnancy that you are taking them to be. Or maybe they were - but only your doctor could tell you.