
Idk abt IUDs but Nexplanon is likely to give you worse symptoms than the progesterone options you've tried since it's higher dose and not localized, and according to its website it can migrate and has been found in lungs and arteries and can be impossible to take out. I'm in a lawsuit against them for >$30,000 in medical debt from the side effects. It would have been better if the doctors I begged to take it out didn't gaslight me for months.
Got an IUD, very painful but dissociated so its fine. Probably didn’t get put in right tho. I bleed during sex (no pain) and you can easily feel the end of the IUD when fingering me, even if I’m very aroused. Some have even felt it during sex. Unusual experience that likely means complications. There are other options to consider tho, like nexoplanon.
I have a copper iud. Barely hurt at all to put in (less than a lip piercing, maybe a 3/10 on the pain scale) but i did have extremely bad uterine cramps for a day or two afterward; i could walk around but not much else. I started testosterone only a few months after getting it but for those few months my period was more regular (level of flow didn't change). I can't speak to a hormonal iud in terms of effect on period but i assume the insertion process would be similar in terms of pain.
if you're wanting a permanent birth control method sooner, idk if you've seen this thread of doctors who don't make ppl jump through hoops to get their tubes tied but I try to share it whenever it's relevant https://www.reddit.com/r/childfree/comments/uhhk6f/megathread_doctors_lists_and_sterilization_info/ endometrial ablation might be a more accessible/timely option than a hysterectomy after getting your tubes tied to reduce your periods without hormones
I got very unlucky with nexplanon and it made my period permanent lol but everyone else I know with it has said it's either lessened or stopped their period. personally I haven't experienced any other side effects from it though but yeah I can't take the pills either bc they always make me sick you can also always make an appointment with a doctor or planned parenthood to talk through birth control options if you haven't yet
I really do think it would be worth it even if the insertion had been excruciatingly painful, though (and I've heard for some people it is! It really depends on your cervical sensitivity). Keep in mind that an iud is pretty much a decade-long solution. After those first two days i haven't had any issues (it's been maybe 8 months now?) and i have never in any way felt it or been bothered by it. I'd suggest you pursue it.