Is this a sign things isn’t working?

My fiancee and I have been engaged for nearly a year and we been together for 5 years and 6 months total. Lately we been having disagreements I feel every other night. I love her and I definitely do have good memories with her and she makes me smile but half the time it just feels like it’s forced. I try to be patient with her but she gets agitated to easily. I feel sometimes she hold my past over me when I was unmotivated because it was a very hard period in my life losing family members, homelessness, etc. Sometimes in her eyes I feel she might think I’m lazy but honestly I’m just so jaded from all the trouble and traumas in my life. I would really hate to throw away 5 years and the fact my birthday just past and she gave me a wonderful picture book with our memories it just hurts man.
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The past year I been motivated to make things right and working and improving showing her I still love her plenty and even engaging to her.
Is this a sign things isn’t working?
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