Nauseous and back ache could this be labour?

Serii • Miscarried 2.03.15 Aamaal 16.08.16 Due 4.05.19 27y/o married to ❤️
I had a internal exam done on Friday because i had what seemed to me as a show which i was 1cm dialated and then i had a speculum exam done on Monday due to pink blood mixed with discharge who told me i have lost my plug. Tuesday i was seen by my consultant who internally examined and sweeped me again who said i was 2 cm dialated. 
For the past few days ive felt like minor period pains. I feel exhausted and i have trouble falling to sleep. Ive felt my stomach tighten also.
As of yesterday ive been getting sharp pains down there and last night ive had mid-back ache and constantly hot along with feeling nauseous and have been sick twice whilst asleep. I hope this means labour is kicking in...