Need advice please....

So my partner has been out since 8.30am at his friends stag-du...they went out of town for the day but have been back in town for the last 3 hours...I have 3 intense children and am pregnant with my forth...I am in the first trimester so am not coping in the evenings and am very nauseous....anyway am I being selfish when I'm angry at my partner for staying out so long knowing I can't cope...he isn't coming home anytime soon either...most probably after everyone is bed....I feel like crying...am I just being emotional or should he be home helping....😔