Will i go to prison??? help?

hi i am a 23 year old girl and my partner is 53, please dont judge because we have a great relationship, but any way 4 years ago when we met we started off by having arguments and fights and i got arrested first time, arrested a second and arrested a third time and then i had to go to court for giving him black eyes and stuff, i really new i needed help, so any way i got help because i know i am such a great person but just with serious problems from my past. any way 4 years has gone by and there was no more fighting i have been on medication and i have been fantastic. but 2 weeks ago we went out for a drink and got drunk, at the end of the night we had a argument when we got home, we were pushing each other and shouting and next minute we both fell down stairs and he has broken his leg, the ambulance come and police and they took me off again. i went in the cell and then they have now put me on bail and are trying to blame me, saying i pushed him downstairs, i can swear thats not what happened, we both went down, they are trying to accuse me cos of my past, please help.. does any one know what will happen when i have to go back to the police station?? will i get a charge?? will i get prison?? im so worried over somethng i know was stupid. i always admit what i have done and the police know im honest in my past and i seeked help. but im not in the blame for this....