Early signs, or symptoms from nexplanon

Em
So I had a huge speech on Friday and I woke up that morning with nausea and diahrea, sorry. And I thought it was just nerves but It happened again today. I have been on nexplanon for about 2 months, and it's the only form of BC we use. Could I possibly be pregant or is my body just adjusting. Any input is helpful. Thanks :)