TTC -help me

Ch

Me and my DF are TTC we get married in April but have been trying for a while and I can’t seem to stop checking constantly if we are pregnant and every time is negative. I am feeling sadness and jealousy for those around me who have children. It’s all I’ve ever wanted since I was a child was to be a mum. I do everything right and still nothing. Anything unusual that has worked any advise to keep me sane anything really would be a help