For the health of the pregnant woman, it should be done immediately. Call your health care provider to get an appointment tomorrow. If they can't get you in tomorrow, ask for a referral to a provider who can see you right away. In our area, Planned Parenthood would get someone in immediately for that appointment.
If you leave the copper IUD in too long, there are no potential health problems. If you leave a hormonal IUD like Mirena in too long, you may not be protected against pregnancy, but there are no other risks.
You should be able to safely remove it whenever you want. There are some that last up to 5 years, but that doesn't necessarily mean that you can't remove it for that long. The point of an IUD is that you can have safe, non-permanent contraception for as long as you choose.
You should remove your IUD if you want to get pregnant, if you are pregnant, or if its useful life is expired and it's time to replace it.
There is no need to remove the IUD before (or after) having your tubes tied. Leaving it in will ensure continuous protection.
It's the same as the procedure to remove the IUD when you're not pregnant.
There's no special time to remove the IUD if you want to get pregnant
The sensation of IUD removal is a lot like that for IUD insertion, but much briefer. Instead of inserting both the sound (measurer) and insertor for the insertion, there's a single cramp as the IUD is removed.
The strings on an IUD are very long when it is removed from the package. After insertion of the IUD, a health care provider typically trims the strings so that they're about 3-4 cm long measuring from the opening of the cervix.
An IUD can be left in for years without causing problems. A hormonal IUD will lose effectiveness, though.
Hysteroscopy is usually the safest way to remove an embedded IUD. Rather than surgery, a scope is inserted into the uterus, and the doctor removes the IUD during an outpatient procedure.
Find another doctor
Your local family planning office can remove your IUD, most likely on a sliding-scale fee based on your income.