Has this happened to anyone else??

Jasmine

So after I had my son in 2010 my period became very irregular...I would go months without a period. Well in 2015 I was about 3 months late and I had sore boobs at 1 point in which I decided to take a pregnancy test which im not sure why I decided to take one because I was 3 months late...I got a very faint positive put I didnt think anything about it because it didnt pop up until about 10 minutes after I took the test...a week later I started having severe back pains went to the emergency room and was told I was pregnant and most likely was having a miscarriage because at that point I started bleeding. At the end I had a ectopic pregnancy my right fallopian tube had to be removed because it erupted and I was 4 weeks pregnant. Point is I was 3 months without a period until this day I do not know how this happened and have not spoken to anyone who has had similar experiances....has this happened to anyone else???? Also I've been trying to conceive again with 1 fallopian tube and it has been a struggle.