Did you lose weight before TTC?

I’m overweight about 240 I’m 5’ 8’’. I had a miscarriage in August and my husband and I have been trying ever since. I haven’t been able to get pregnant I’m not sure why I just started temping and I’m gonna start using opks. But I’ve also been trying to lose weight recently, is there anything I should specifically avoid while TTC. I’ve changed my diet quite a bit lately and have been trying to eat and more well rounded diet drinking tons of water I drink about a gallon a day. Any other advice would be appreciated.