Ectopic?

Anyone ever had a Ectopic pregnancy? If so what we're your signs? Idk if I should go to the er or not at this point I am 5 weeks tomorrow and have been having pains on my left side only (not cramps) they are very mild but uncomfortable and inconsistent. I've had pains in my legs that come and go. And I'm lightheaded. Not sure if this is normal or not. Any kind of input would be appreciated.