I'm so depressed

15 weeks, day 4 of the day worst head cold and chest infection I've ever had. My partner barely gives a shit. He doesn't even want to be around me. 
I've spent nearly 4 solid days in bed resting, steaming, doing nasal rinses and I just feel worse and worse every day. 
He's going off with his family who have rented a big house for a long weekend. Obviously I can't go because I feel so unwell plus pregnancy is not agreeing with me! 
They don't get why I can't come. They can't see past their own perfect arrangements. They all make me feel like a massive party pooper for staying home. We have no one to feed our cat either or water our Christmas tree. 
I feel so frustrated and angry and I've been so lonely by myself while my partner is in the next room and he really doesn't care about me whatsoever. I feel I'm just getting worse each day with zero improvement at all. The depression and loneliness of it all is unbearable.