History of previous miscarriage. I do?

I had history of 2 miscarriages..In every case it was happened with empty gsac..Now I have concieved again and now till 13 weeks every thing is normal as from the day of I got double line in kit dr put me in lmw heparin inj,ecosprin 75,duphaston etc.. According to me for the injection only my pregnancy is successful as I have history of blood clotting thought my apla is negative..in my leg big big black,red patches used to happen and swelling and pain was there...i think I have dvt issues..as I don't have apla dr is stopping my heparin injection..in my family my aunt and mother has same issue like me...even my aunt had gone through brain blood clotting surgery...it's hereditary..i am very tensed as dr is stopping heparin inj..will it be good for stopping?as I read in net that it can cause still birth...pls help me dr...what should I do?i am attaching 1 example photo like which I use to get before pregnancy and heparin injection