Trying to conceive

Hi I’m 38 a mother of 3 children my eldest son nearly 16 and my daughter 8 and my youngest son 6 with my ex husband who was very abusive and violent I finally left him nearly 3 years ago, I never thought or believed that I would find true love after what I went through I didn’t believe in love but about 6 months ago I found someone that truly loves me for me and adores my kids, he married me against his family’s wish, he’s never been married or has kids, I keep feeling I’m not good enough for him I keep telling him that he could have married anyone single with no baggage, I keep pushing him away, I feel like few years down the line he is going to start resenting me for having kids, he always reassures me that he loves me and he’s not going anywhere, I love him so much we’ve been trying for our own baby together and it’s been 5 months and it’s just not happening I’m scared if we don’t have a baby of our own he might resent me and leave me, I’ve never had trouble conceiving in the past I don’t know if it’s my age, I’d really love some advice and reassurance from all you guys reading who can understand and has been in a situation like me.. I look forward to all your replies I’m really desperate to have our baby..xx