my s/o doesn’t trust doctors- LONG!!

I have quite a problem and I need some feedback to reassure me that I am being considerate of his feelings but also taking care of myself and my baby.

a little background- all of my life I have been a “sick” person. I have had migraines and stomach issues for as long as I can remember. my whole childhood I was hospitalized off and on for stomach issues that they believed were “blockages”. it wasn’t until I was diagnosed with crohn’s disease at 17 that it all made since. I have been on humira since and after 3 years my crohn’s is finally controlled and we believe I am in remission (yay!). so since being pregnant I have stopped medication and have been doing well! however, I lost about 15 pounds from being sick in the first trimester and I’m not putting it back on for some reason. my doctor set me up for an appointment with a specialist to make sure crohn’s doesn’t keep the baby from growing properly since my body doesn’t absorb nutrients and vitamins correctly.

also, both protein s deficiency and factor 5 blood clotting disorders run in my family and it is very prevalent. I have been diagnosed with a mild case of protein s deficiency and since my mom had a blood clot in her lungs provoked by child birth my hematologist wants to me start anti-coagulantion injections to reduce the risk of a blood clot.

well- it turns out this is all WAY too much for my boyfriend (the father of the child) to handle. his family doesn’t really go to the doctor, he wasn’t vaccinated, he hates medicine and says he doesn’t trust doctors. we got in an argument because I felt like he was attacking me for something I was born with and wish I didn’t have. I just want his support. he doesn’t want me to take any medication during pregnancy, he doesn’t want me to take the blood thinning injections, and he thinks I’m perfectly fine since I’ve been off my humira. he doesn’t understand because he wasn’t there when I wasn’t in remission. he thinks if I just eat healthier and drink more water I will be fine. we obviously disagree about medicine.

I feel like it’s easy for him to be “anti medicine” because he has never needed medicine to be a normal, functioning person. please reassure me I’m not crazy for wanting the blood thinner to protect my baby and myself!! and let me know if you have any idea how I can communicate this to him. I cannot understand why he would want to purposely risk me getting a clot when he knows my mom almost lost her life to one after child birth.