what's wrong with my body

Ok so I got off nexoplanon on October 18 2016 and got my period on October 30th since than been getting my period every month, but not in the date in November I got it on 28 and in December I got it on 26 and today I got it on 23, my cycles seems smaller and also before getting my period I feel extreme nausea a day before with mild leg cramping, this time I was hoping to be pregnant 🤰 and wait until I miss my period, but I woke up this morning with blood in my underwear I was so 😭, I wanted to surprise my husband for his birthday on feb 20th. I'm just having anxiety and depression what's wrong win my body. I feel fatigue before I'm about to get my period and yesterday I had so much growling in my belly I was having all the pregnancy symptoms.