Pulmonary embolism and pregnancy?

Kelly
Hey ladies!  Husband and I are currently ttc baby #1.  About 5 years ago I ended up in the ER with a blood clot in my lung, which was due to estrogen in my birth control. 
After talking with my doctor, he said I'd have to be on blood thinners when I find out I'm pregnant (from either a baby aspirin or lovanoxx injections)
Have any of you had a PE and how did it impact your pregnancy?
Thanks so much!