Given you are pregnant, call the out of hours service and leave them to make the decision with regard to if a GP needs to visit.
Try to do as little as possible and stay in bed. Max Strength flu powder may help, Large spoon of honey with a squeeze of 1/2 a lemon, plus hot water may help throat.
See how you are tomorrow. If you need to tell work today that you won't be in tomorrow, rather than telling them in the morning, then probably best to take the day off and take things one day at a time.
Thanks all, have spoken to lovely out of hours GP who says I was absolutely right to call given pregnancy and asthma! He said it sounds like a bad cold, but I must keep on taking temp and if it goes above 38 then to call back immediately.
He said if I stay the same and I feel up to it then I can go to work tomorrow.
Think I will see how I feel later, it doesnt matter if I tell work today or tomorrow whether Im going to be in. (nanny dont think either max flu powder or honey allowed in pregnancy - its paracetamol only)