@kallubsmqd
Nexplanon is 20 x more effective than birth control pills in preventing pregnancy. But just because it very rarely happens doesn’t rule it out. It is reassuring tho. To be sure, you could order a pregnancy test online, since you have a hard time getting out. I think it would put your mind at ease.

As an aside, with your constant bleeding, you could consider you ate getting enough iron in your diet. I have attached a picture with appropriate foods. If you dislike or are unable to eat these foods regularly, u could try iron pills. Beware, they are hard on the stomach and can cause uncomfortable constipation. I recommend taking them with a stool softener