Could this be it?

It’s been a month and three day since my last period. It’s been 3 weeks and a day since my last ovulation cycle according to this app. I had mirena for two and a half years when i got it out in late September. We’ve been trying for about 6 months now. Within the last week my appetite as dramatically decreased. I’m never hungry. Ever. And when i try to make myself eat i take a few bites, literally just a few, and I’m full beyond full. My stomach has been so uneasy. Slightly nauseas but not bad enough to make me want or need to throw up. Today my stomach literally hurts the worst. I woke up this morning and my SO wanted to take me out to eat before work so we went. I wasn’t hungry but i didn’t want to turn down a lunch date. I ate hardly anything i ordered and was full. I took the rest home but left it in his car and he works out of town so the only thing I’ve really eaten today was a microwaved baked potato. And i hard time eating it as well. Also, when i take my bra off my nipples hurt so bad. They ache beyond belief. This would be my second child. It’s been almost 4 years since i found out i was pregnant with my daughter so I’m kinda hazy on how my body should feel. But also the only symptom i had with my daughter was morning sickness. I took a test 3 days ago and it was negative. But something just feels off.