Can't take birth control other options

Hey guys. So I have a rare genetic disorder that basically makes my blood clot and the hormones in birth control are def too dangerous for me. I got really sick when I was on it and have been "banned for life" according to my doctor. My boyfriend and I have been together for quite some time now (2.5 years) and lately we're both so worried on getting pregnant our sex life has kinda ceased. What are some other non-hormonal options? My doctor even suggested I stay away from IUD'S and we've tried the spermicide and condom route but aren't very consistent with its use. Any suggestions? We want to have children eventually but want to make it past our mid twenties first!