Try and try again

We have been trying to get pregnant since our miscarriage last October… still no luck. We had to get my ovulation back on track from November through January. We have really been trying hard and going at it. The Ovulation kits don’t seem to really work for me I am due for my period in 7 days. I tested today and got a negative. Should I retest in a few more days? When should I contact my doctor again? I’ve been nauseous, having food cravings and aversions, and fatigue.