I’m not sure if you mean PR by PO, but if so, did you apply in March 2019 or 2018!? If 2018 you should definitely contact IRCC as it has been more than the processing times, as stated in their website. You can even ask your MP to enquire on your behalf. However, if you applied in March 2019, I would stay it’s pretty normal because I applied in February 2019 and I just heard back from them about three weeks ago. Either way, I think you should order GCMS notes to have an idea of where are they on your application and I think it would help ease your mind a bit.
As for visiting your family, I have traveled with my RTD to see my parents and did Umra in Saudi Arabia before I received my PR
P.S: ( some people say it’s better not travel until your PR is finalized, but I did anyways as many before me did and didn’t face any issues).