Missing period due to stress or BFP?

Jillian
So I got off the BC pill about 2+ months ago. Was on it for 10 years so I decided it was time for my future husband and I to try right after the wedding. Well, I had one period coming off the pill on a 40 day cycle. 😳 then NOW I'm missing a period, on a 55 day cycle!!  4 BFN's no other symptoms. 
I'm getting married in 10 days, soooo much stress to deal with right now. Could stress be a leading factor? It's been extremely difficult knowing I'm not regular and planning a wedding. This is why I also hate birth control, it completely screwed me up 😕 anyone else have this issue?