I have a BF who is like your DH,...consider taking an aspirin or acetaminophen or something else (that's considered to be relatively harmless, over the counter and safe) and he acts like I've suggested that I go shoot up some heroin or something for my pain relief.
An utterly ridiculously overblown opinion / reaction to the need for pain relief.
Everybody's threshold is different. It's not a contest. Yes, perhaps in his own way he is concerned for your health, worried about your liver, worried about your system developing a tolerance to the drug and then you'll have to try something else that's stronger...
But to be honest, the moaning you describe about his constant complaints/refusal to support your decision/making you feel guilty for taking a simple pain reliever... That's certainly not making you feel any better is it?
I might have missed this in one of your posts but, when you're feeling unwell, does he go out of his way to try to help you? Realizing that you're under the weather, does he say he'll take care of dinner, take care of the household, take care of the chores. Does he endeavor to create a quiet healing environment for you (for instance a bedroom with dim lighting, maybe your favorite aromatherapy, soft music that you enjoy, a hot water bottle for your feet, cold towel for your head, rub your shoulders, whatever makes you feel better?) Cuz my suspicion is probably not.
(Mine certainly doesn't)
All very well and good when you're working away, doing everything, getting stuff done, but then, when something hits you, (whether it be migraines or a bad period or some other issue that's beyond your control no matter how much you try...) and they know that you're down for the count when this hits you, and they don't do anything that they can to make your life a little easier, to help you feel better quicker?
It's a dick move.
(I'm not putting your husband down specifically, I'm speaking about anyone who does this)
Maybe I care too much, but when I'm with a partner or a family member and they're suffering from something, i may not be able to make them better, but if i can make them feel a little better, i try.
Because knowing that nobody cares about you, nobody's going to help you, and that DP's fed up with "oh, that problem again? You always complain about that..." and off he goes in a huff to go sulk somewhere because you're not feeling well...
Man that sucks.
Hoping that you're feeling better.