I feel like this may take a little time

My husband and I have been TTC for about 5 months now. I know that is absolutely not long at all BUT it is still frustrating to get AF and BFN. So many people try cheering me up with "it'll happen when the time is right" or "everything will work out in the end". As true as it may be it's still hard to hear. But I'm just wondering, how long should we try for before going to my OBGYN ?!?! I've seen so many different time spans and was just curious?! Thank you ❤️