Data deleted on Glow

Hi there,
​Wondering if anyone has had the same problem as me. I did a home test a week ago and learned I am pregnant. When I updated my glow app to be "I'm pregnant" instead of "trying to conceive," all of my red and green highlighted calendar periods were deleted from May and April. I now can't remember when my last period was, and therefore, aren't sure how far along I am. Anyone know a solution?