How long?

Mads

My partner and I have been trying now for 8 months and I am due for AF in 2 days. I had a BFN this morning and I’ve now started to get cramps. It’s starting to get quite defeating seeing a negative result month after month (especially since we know we have both been capable of conceiving before with previous partners) How long did it take you to fall pregnant? And how long should I leave it before seeking assistance?