Hi, @nrbecerril. I am sorry that you have caught a cold and hope that you are not feeling too miserable. I don't think that this is a 1st post-transplant event that you were looking forward too.
My first Tip is to tell you to stay hydrated and maintain your medication schedule. Another thing is to keep check of your temperature, and if it goes above 101 F (38.3 C) or if you have a lower fever that lasts for more than 2 days, you should call your transplant coordinator.
I don't know why your doctor said "No tea" , unless you are drinking an herbal of unusual blend. I have not heard this before. Maybe someone else has an idea and will share it here.
As a transplant recipient, you will be able to take certain over-the-counter medications for discomforts of a cold. You might have received a list from your team. My word of advice is to check with your transplant team before you take anything because they will know what could react with your transplant medications. Sometimes a pharmacist or even a PCP , ER and hospital personnel don't know the complexities related to a transplant.

So my advice is to stay hydrated, take your transplant meds, get rest, and if any questions that concern you - call your transplant team. When you are newly transplanted like you are, please do not hesitate to consult your team.
And one more thing from my experience - I discovered that since my transplant, it takes me longer to get over a cold than it did before my transplant.

I hope you feel better soon!