Help?!?!

I’m in the last few weeks of my pregnancy with baby number one. Me and my partner are only 21 and have been together just under a year. I feel like he’s falling out of love with me already and I don’t know if it’s normal towards the back end of the pregnancy to argue all the time and most times we argue he makes me cry... like today I was making a sandwich and I suffer badly with psd... my hips gave out on me and I nearly fell to the floor. To stop myself falling I reached my hand out and accidentally caught a glass of milk that went everywhere and he lost his temper with me so I left and went to my bedroom and cried... someone please tell me this is normal behaviour because I really do love this guy and I’m terrified of losing him... also if you have any ideas on how to get him to possibly love me again then that would be great?