You only received a dose or a couple of doses of Morphine correct? If so, there is NO way you are experiencing "withdrawal" symptoms. It is POSSIBLE that you have experience an ADVERSE EFFECT from the Morphine. Phenergan can also cause adverse effects as you have described. Keep in mind you received THREE meds, so it would be difficult to just state it was the Morphine that caused this.
In my opinion, this COULD be a combo of the meds and infection or just PURELY the infection, however, THIS IS NO DELIRIUM.
Are you able to eat and drink anything?
When are you seeing the physician? You should be seeing one like today.
I agree with the comments above regarding this could be an adverse reaction to the medication/s, although it'll be difficult to determine which one since you had a few different ones.
Dehydration can also be playing a big role in this whole thing. Your symptoms of having dark urine is a very good sign that you are/were dehydrated - which was probably caused by your vomiting. Dehydration can sometimes happen quite quickly and it can affect your thinking, motor skills, energy levels, etc.
While you were at the ER, did they do any testing to determine where the blood was coming from that you were vomiting? Any signs of blood in vomit, stool or urine since the ER visit? If there was only a little bit of blood and it only happened that once, chances are everything is ok (you can sometimes tear small blood vessels when you're vomiting if it is forceful and/or sever) - however, if the bleeding has continued, you most definitely need to get it checked into immediately.
Are you still on any of the medications? If so, you may want to try to not take them and see how you're feeling and if it makes any difference in your other symptoms. That may tell you better whether it is medication related or something else - but I also totally agree that this is not delerium - if you were delerious, you wouldn't realize that the symptoms you're experiencing are not your normal activity - so please relax about that.
I'm glad to hear you're going to be seeeing a doctor, but I also agree with the above comment that you that needs to be done ASAP - today if at all possible.
Please keep us posted on how you're doing!