Help me!!!

Alexis

Yesterday was my 2 weeks of being late for my period. My last period was April 7th and my periods are irregular. I haven’t been feeling like myself for the past week and a half, getting a lot of early pregnancy symptoms. But I’m very confused because all of my test have come back negative. But from the calculation from my last period, my app is telling me I’m pregnant. I have a doctors appointment the 28th of this month. But I’m wondering can I still be pregnant even with the negative results and my HCG levels aren’t high enough to show in a test?!?!