Relationship advice

So my fiancé and I got in a heated argument and he ends up telling me that I'm worse than his ex, keep in mind that they broke up 1-2 years ago, she cheated on him consistently and lied to him all throughout their relationship. He also got her pregnant but she lost the baby due to drinking and during and after her pregnancy she lied and shut him out of her life. But apparently I'm worse than her because I treat him bad. I'm 9 months pregnant and yes I admit that I have my moments where I snap and I'm in a bad mood and I get really needy and controlling but I can't help it sometimes. I need advice ):