Swollen fingers on 1 hand 16 weeks

🌈 Jennifer 🌈 • Blessed with a 3yo girl born 9/12. Missed miscarriage 4/15 & blighted ovum 10/15. Waiting on our rainbow due 9/16.
I am 16w and the fingers on my right hand are red and swollen. It started about an hour or two ago. (I'm also naseous and have a lower backache, although I don't think they are related).
I've had swelling with my past pregnancy with my daughter but not this early. I also don't remember the skin turning red. 
Any thoughts?? 

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