Is Normal Pregnancy Possible When Having History Of Blighted Ovum?

I am 35 and ttc 2nd child. I had a blighted ovum in August 2014, then a chemical pregnancy in December 2014 and another in February 2015. My doctor wouldn't do any testing. In fact her NP just told me to keep taking prenatal vitamins. But from what I read and considering my age it seems it's time to have some tests done. Should I look for a second opinion or insist on testing?