First off, hi,i'm new here, but have been ttc for 8mo and researching the heck out of it.
Ok, sooooo.....
As for the time youre fertile, it's 10-14 days before your period is due. The 10-14days after you o is called your lp/lutealphase and is very important to sustain a pg.
How long are your cycles? Day 1 is the first day of bleeding, last day is last day w/out bleeding. Not all women ovulate on day14 or have 28 day cycles. Thats why you count back 10-14 days,your lutealphase is consistent, but your o isnt usually.
Personally, I have a 27 day cycle, and a 13 day lp. So that means I o on day 15 usually. 13days before my period.
Anyway, usually implantation occurs 7-11 days after conception. At that point you may start geting symptoms. Right now you are only about 4days past o. The earliest you could get positive results is 11 days past ovulation(dpo)
allof your symptoms are consistent with pg, but also with pms. It's too early to tell, and too early to test.
Sorry if I confused you, feel free to pick my brain if you have questions!