When I was pg recently my only early symptom was being tired. I only noticed other symptoms after my AF was late. Then again I wasn't charting then, so I wasn't really paying any attention to what was going on.

Last cycle I had pg like symptoms in week 3 of my cycle that disappeared in week 4.

I've had symptoms from day 3 this cycle and am hoping that they actually mean something this time, but as my doctor told me I appear to be high in estrogen maybe these symptoms are caused by that.

3DPO emotional, prominent blue veins in bbs, indigestion & lower back pain. Broke out. These all must must O symptoms as that's way too early for anything else.
4DPO headache, nausea that night, lower back pain.
5DPO indigetsion
6DPO slight cramping, sharp vaginal pain, volatile pimple, tender bbs, one stabbing pain left side under rib, feel like getting a cold.
7DPO emotional, irritable, blocked nose in the morning, left side abdo cramping, sensitive bbs.
8DPO bleeding gums when brushing teeth, emotional, cramps on left side continued, lower back pain, sensitive bbs.

All the experts say you can't get symptoms until after implantation so theoretically all this has to be in my head. I guess time will tell.