After 8 days without, withdrawal began setting in. Because of Diazepam's long half-life, you still had some in your system. You reinstated when your order arrived, which is good, because you were well within the time frame to do so. Now, you need to get stable, and this may take some time. You are dealing with viral illnesses and the withdrawal on top of it. Rest, fluids, try to eat healthy. Wait another week or two and reassess how you feel. You need to be stable. You should feel the way you did pretty much did prior to the cold turkey, with minimal withdrawal effects remaining. If you want to wait until you are feeling none, you can. It can take up to 3 weeks to stabilize on Diazepam.
Were you taking it daily prior to the unfortunate cold turkey? How long have you been taking Diazepam? Was your original dose 10 mg?
Whatever you took, how long or how often, the fact you experienced withdrawal is evidence of dependency. Ideally, you should not taper more that 5 to 10% of your dose every 10 to 14 days. My experience with Diazepam, is that it's better to wait the full 2 weeks, before making another cut, due to it's long half life. You'll also need a mix of 5 mg and 2 mg pills. I'm assuming you are now using a 10 mg pill. Is your doctor willing to prescribe those for you? I don't know how often you can get prescriptions filled in the UK, but here in the US, it's usually every 30 days. So, you would need 30 5 mg and 75 2 mg pills for the month to do 9 mg. Initially, you might be fine with 1 mg cuts, but eventually you will need to make smaller ones.
Save any pieces you cut and don't use and put them in an empty pill bottle. That way if you run short, you have a stash you can use to get you by if you run out.
