Could I be pregnant?

My boyfriend and I just started trying for a baby this month. We both are so excited and want this more than anything. I began feeling cramps and lower back pains after my ovulating week. I’ve been nauseous, and going through all of the symptoms I had before when I was pregnant (miscarriage) I took a test a little too early (maybe 10 days early lol) just to see what would happen and it said not pregnant. I strongly believed I was just patching myself out and forcing myself to believe I was pregnant so my body started acting like it, but I finally accepted I’m probably just not pregnant this time. So I had a few alcoholic beverages, nothing crazy at all. I can normally hold my liquor very well but the next day I was throwing up ALL DAY LONG. it actually lasted almost 2 days of constant nausea. I mentioned it to my mom and her first comment was, “you could be pregnant” and she doesn’t know we’ve been trying. Am I just over thinking or could I actually be pregnant? Or is my body/mind playing tricks on me?😭