Mood swings, depression, not coping!!!

I'm really struggling I haven't been on antidepressants for 2 years. I've been at my happiest and I very rarely had bad days. Since becoming pregnant I'm almost 8 weeks. Im horrible I cant cope, I think everything is against me. I cant stop crying. I'm angry at my partner for everything he can do that I now cant! I dont know what to do with myself. I'm scared to go to the doctors as I dont want to feel like I'm failing and having to go back to tablets. My partner just doesn't doesn't get that my hormones are crazy at the moment and just keeps saying if this is the beginning I hate to think what the next few months have in store. I could literally rip him apart I feel that hes insensitive. Even though rationally I know that's just his jokey way but I cant take a joke anymore I'm literally at breaking point.. feel like I need to run around screaming!!

Please tell me theres others of you that get how I'm feeling???