Nausea

I havnt had an apitite in like 4 days but I still have been eating. But now every time I eat I feel really nauseous...I have taken test and there has been faded lines on a lot of them but I’ve been thinking they have been evap lines because of how faded they are. If I am pregnant I would be around 3-5 weeks pregnant. My issue is is that because I don’t get my period anymore (because I got off of depo) I don’t have enough hormones for a pregnancy test to come out pregnant. I am going to the women’s care center in leas than 2 weeks with a morning sample. And I will be asking if they could do a blood test or something as well because of that reason.