Sleep issues 4wks

Adele • 27. TTC baby #1 for 11 months, born July 2015. TTC baby #2 since march 2016 BFP Aug 2017 MC at 5 weeks BFP Oct 2017 🌈 Rainbow baby due July 2018🌈
I only just got my bfp yesterday but for the last week I have been waking up earlier and earlier each morning and not being able to get back to sleep!! I don't have to get yo until 8am and this morning I woke up at 5.30am ughhh. Oh and I'm super hungry alllllll the time!!! Could this be pregnacy related or is it just my body?