If you're planning to keep medication at home - please do your research and check the conditions the medication needs to be stored at, bevaise the shelf life given to medication assumes that the meds are kept in a climate controlled pharmacy.
My pharmblr buds will be able to say more, but Contraceptives can lose efficacy if stored at higher temperatures than expected. When I was working in my sexual health job, we had to adjust the expiry dates on a ton of contraceptive rings, for example, because the heatwave and lack of AC had meant we could not guarantee that they would be functional. Store contraception exactly how it states on the packet, and never let anyone else have access to your medication. If you have a partber who could tamper with it, keep it out of their reach.
Take plan B as soon as you can after the PIV - it's more reliable the sooner you take it - take it within 72 hours if you can. The planned parenthood website explains it in more detail.
On a more general note, copper IUDs are the most reliable EC and you can keep them in after using them for emergency contraception.
Also, if you can get a copper IUD they can last for 5 years. Some types will last as long as 10 years. They can make your periods heavier or more painful, unfortunately.
On the other hand, hormonal IUDs can last for 3 or 5 years and can make heavy or painful periods better for a significant portion of users. They are the first line treatment for heavy or painful periods.
Likewise the contraceptive implant lasts for at least 3 years, in the pandemic we received guidance to extend that for 4 years. It can also make periods lighter or make them go away. They don't work well for everyone- some people get heavier bleeding or other side effects, but if it doesn't work for you, you can get it removed.
You can get extremely reliable contraceptives - as reliable as getting your tubes tied - that will outlast a Trump presidency.
And if you aren't safe, your partner doesn't even have to know you've got one of these forms of contraception in place. Though it is still important to try and leave them in a safe manner when you can. You can't see the implant and you can only feel it if you know where to look, it leaves a tiny scar after the initial bruise fades.
And for IUD strings, if you leave the strings a little longer, they generally can't be felt - they just curl up around the cervix. Short strings are more poky and more likely to be felt.