I'm worried about getting married again?

I'm scheduled to be getting married in a month and i am really nervous. This will be my 2nd marriage i was married for 7 years to my EX Wife Stacy. I was blindsided by the divorce i thought everything was going good and the first part was not being able to see my daughter all the time like before. I only get to see her now on weekends. It's only been a year since the divorce and i am still adjusting to the change. My fiancee Dawn pressured me to propose earlier than i wanted because her EX Boyfriend and her were together for 5 years and he never proposed she felt strung along. I love Dawn i just don't think i can get married again at this tie. I do want to marry her someday i just feel now it's not the right time. The problem is she has planned all this **** in advance and i known she would be pissed if i told her how i truly feel. What should i do?