Disclaimer FALSE POSITIVE

Found out I had a ectopic pregnancy 

I I'm pretty upset I don't know what I can try to prevent this from happening. Been TTC for almost a year. And used ovulation kits and etc. this was the first time ever testing positive but as for this My heart tells me this isn't the first time it's happend and that its happend before without me knowing. I took this Saturday morning got negitives Monday got my period today 😞 someone please help me idk how to prevent this from happening again.