I don't want to marry anymore

Lindsay
Sorry for the long post. 
So my fiancé had a problem in the past with talking to other women ended his first marriage and obviously it hasn't changed we Have a 1yo and another on the way due in aug....now I feel like I'm regretting the new one coming:( ...
Well I have been cat fishing him little does he know. He tried to leave early to go see this girl that he thinks is real. He had said that he forgot he had a meeting he needed to go to for work. It worries me because this isn't the first time he has used that excuse to leave early. He even told the fake girl he was in a relationship and said that he thinks I don't want him anymore (I have had morning sickness for the past 2 weeks non stop and I've been exhausted 24/7 I try to have sex with him when I feel better and when the baby is sleep but like I said I've been very sick) so I don't know what to do now I'm only 8 weeks we just got a new car and a new apartment and I'm a stay at home mom while he works. I don't want to be with him anymore but I don't have a job to pay any bills or daycare or anything. I'm just so hurt because I thought everything was getting better but it's obviously not. And also how do I keep up with this fake person and let him know I know. Please no bashing