help!

I'm so confused as a woman and a wife right now...

so my husband and i have gone threw at least 3lg fights that ended with lets get a device... however once calm we were able to mend things. But its hard for me to now be whole hearted in our relationship. we have been together for 5 years almost and married for 2. 5 and we just had or baby girl a little less than a year ago (that's more so when the issues started- which i know is common). At first our fights were about house work and choirs, i asked him for help around the house and he said he would not be changing or helping. If i ask him to watch the baby so i can do somethings around the house he can't handle her (or doesn't want to try). And our fights gradually became more serious where if i worked late he thought i was cheating.

Now we are finding out that he has to get a fraternity test done because some woman is claiming him as the father(before me) , mind you he has an older daughter too... I'm not really happy with my role and some circumstances tell me to leave but then i think it's not very Christian of me... so I'm having an inner fight about everything... do i work less hours so i can go home and take care of the children and house than deal with the financial shit(and remain happy with smiles) or do i talk with him about how this isn't working for me again?

i honestly feel selfish