Bleeding from vagina. Of bleeding again?

It is around 5 years passed away of my marriage. I am 25 years old and my husband is 6-7 years elder than me. Around 3-4 months back during sex I had started bleeding from my vagina due to my husband's finger nail. Now 14-15 days back I had taken primulute n to delay my periods, it was not my first time when I take this medicine and same day I have had sex with my husband but during sex I started watery bleeding suddenly. Two days this bleeding occurs and then 3rd day I started pain like periods and releasing blood like periods from 3rd to 7th day. My husband is healthier than me ( I am around 50 kg and he is around 85 kg) and he has a big penis. From that day he started thinking that it happens because of his penis size. He is not ready to do sex with me and he started ignoring me from that day. I love him alot,I can't loose him. What to do pls suggest.Pls let me know the reason of my bleeding??How to do believe my husband to attract him again??Is it any possibility of bleeding again?