sex with husband

My sex with my hubby is getting boring and we only do it two or 3 times a month and we only got married for 4 months.. currently I am pregnant in my 3rd trimester. I have high sex drive and so do my hubby but he have change, when I started to get pregnant. Only when I'm pregnant he doesn't last long, idk why. He don't do oral sex on me anymore ,or even making out with me. It's always me have to do the job which is tiring!!