Pregnant but no + opk, can it happen?

Question

I still have a few days yet to test for ovulation, but in Oct I got an  + on cd 15 and got pregnant then lost it at 5 weeks, the in Jan I got an + on cd 20 and lost it in feb at 6 weeks. So far no + yet I still have a few days yet but just wondering if it's possible not to get a + opk and still fall pregnant?

Answer

I did get my + opk on cd 20! 5 days to go til af...

Answer

Someone on here told me they never got a positive but did get pregnant. I have used OPK for 2 months and never got a positive, but am still trying.