My 3 month old has been crying and I dont know what's wrong. At first I thought is was because she started teething but now she just cries about everything she wont be put down she doesn't want me sitting with her nothing I have to walk around the house carrying her.

I have checked everything I already fed her changed her diapers gave her gas drops nothing works. Also she only sleeps for about 30 minutes than wakes up

She has been like this for 3 days

Help please any advice?