Mouth Issues

I am going on 17 weeks and my mouth has decided to revolt against me. First it was sore. Then I could tell my gums were swollen and would bleed. Now I have an ulcer. 
As soon as the issues started, I upped my brushing, flossing, and found a gum mouthwash. 
It seems to be getting worse. Has this happened to anyone else? I can't go to the dentist until next month.