The implant, IUD or injection. All of these methods apart from the copper IUD contain 1 hormone (progesterone) whereas your pill contains 2 (progesterone and oestrogen).
The implant lasts for 3 years. It can cause irregular bleeds, bleeding to stop altogether, or prolonged bleeding. Side effects from the hormones are common (like on the pill). Your doctor would be best to advise you as to whether this option is worth trying or not. It can be removed at any time and your cycle will resume immediately.
There are two types of IUD: copper and hormonal. The copper IUD is hormone free, so your natural periods return. Depending on the type it can last 5-12 years. It comes with only two side effects: heavier periods and worse period pain. If you naturally suffer (off the pill) with heavy periods or bad period pain then this will probably not be great for you. Otherwise it's a great option. I currently have the copper IUD.
The hormonal IUD lasts for 3-5 years depending on the type. While side effects are common, many women find that side effects are a less likely issue with the IUD than the implant, as the progesterone is released straight into the uterus rather than another bodily entrance. Bleeds can be irregular, however many women find their bleeds stop altogether after 6-12 months. It can take 6 months for your body to get used to the copper or the hormonal IUD. They are extremely effective methods. The IUD can be removed at any time and your natural cycle will resume immediately.
The shot/injection has similar pros and cons to the implant. It works well for some people. This method requires you to go and get the injection every few months. Unlike the implant and IUD, once the hormones have been injected into your system - it's not like they can be removed immediately. If you ever decide you want to start having children, it can take up to a year after your last shot for your cycle/fertility to return.
