Advice needed please 🥺

Hi ladies ,

Hope all is well , I just have a quick but embarrassing question . So me and my partner have been trying for 5 months now with no luck. My partner is overweight and is having difficulty to lose weight and I’m a smoker . That’s the only reasons I can think of why it’s not happening for us . I have cut down on smokes to 2 cigs a day because I want this so bad and it’s very challenging. Is there something that I’m not doing ? I mean every time he ejaculates inside of me it just runs out and I feel that’s why it’s not happening? Like is that normal ? I do track ovulation and baby dance in my fertile week . My period lasts for 4 days and I’m sure I have a 26 day cycle . Is this irregular?