Pretty long, sorry😁

I feel stupid for asking this but i need your opinons.. For about two weeks i been feeling extremly naseous, i been having a feel am going to throw up by just smelling anything. I tested about 3 weeks ago or maybe 4, test results were negative, maybe i tested too soon? Besides me getting the sensatikn of throwing up i get dizzy couple times a day, been so tierd, just want to be in bed. Havnt had my period since july due to the depo shot, depo shot was suppose to wear off in mid October, since then i still havnt had my period. Whats going on??