May Have Caused It On Myself

I believe that may have messed it up for myself. I was 6 weeks going on 7 weeks...I went to my sister birthday party.
I ate before I left to go to her house,along the way I brought some bananas,water and juice.
I felt hungry then the feeling went away then it came back again....I end up eating late.
Then when I was hungry the second time,then I started to spot.
When I came home,I wasn't spotting anymore and now this afternoon it appears that I am on my mohtly ..now.
I feel like I messed it all up..I wanted to spend time with my sister and have a good time,but I believe the go time cost me ..my baby.
I feel this way.... because my pregnancy test was positive then I went out and I feel I may have messed it all up.
I don't even know ,what to think...I am not in any pain but it's not a good sign for me .