Symptoms!!

I feel like I am completely crazy, but I have felt nauseous, fatigue and occasional breast tenderness for an entire week. Friday night my fiance and I had a family gathering to go to and even though we aren't protecting ourselves from pregnancy we aren't giving it our full go and I wound up drinking one drink that was absolutely terrible to gag down and afterwards I threw everything up. I never ever threw up from alcohol especially not just one drink. Now glow said my strongest day of conception was only on Tuesday, but since coming off bc in Febraury I think my cycles are messed up and ovulated a week before glow predicted. I was pregnant last year (ended in a mc) and I didn't not have this strong of nausea or fatigue this early. Am I going crazy or can you really get symptoms and be able to "tell" you're pregnant before actually testing?