Are these signs of pregnancy?

Last Saturday I woke up feeling nauseous and with upper stomach pain I blamed the Taco Bell that I had that the night before. On Saturday I didn’t throw up but I felt nauseous and I didn’t have a big appetite, i thought I had food poisoning , maybe I did I don't know. That Saturday I had a few drinks and Sunday morning I woke up with a bad stomach pain but on top not on my lower stomach. I also had a lot of nausea but didn’t vomit. Also I’m hungry but at the same time I’m not and I’m afraid I’m vomit depending what I eat. Earlier this week I had the same stomach pain and my nausea is still here and I haven’t ate good.

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I had tender Breast for 2 week now but I don’t have them anymore only stomach pain and nausea with some light headache. I might go to er tomorrow if I don’t feel better but should I expect them to say I’m pregnant? Or anything worse?
Are these signs of pregnancy?
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