??? pregnancy symptoms or what's going on ???

I usually ovulate16 days before period but I got a positive ovulation test at 21 days before period. I'm 14 days before period and feel so exhausted and nauseous and sore nipples and light dull cramping here and there I am non stop nauseous and if I eat I feel like vomiting but so far I haven't. is it possible to feel pregnant this early I know I can't take a test for 2 weeks but I normally don't feel this way 2 weeks before my period normally I get light nausea and light cramps 2 or 3 days before but that's it