I’m 33, BF’s 37 and smokes dro daily

Ok ladies I’ve posted in other groups but never about this so just needing your opinion. I’m 33 and he’s 37, ttc for 3 yrs now and this would be his first baby and my second one. Idk if we’re struggling to conceive because of age or because he smokes dro (a more potent form of weed) on the daily. I’ve already gotten checked and everything’s good with me but he’s nervous to get checked. I figured maybe all the pot he’s been smoking has affected fertility or it’s age too. Also I’m late for AF but keep getting bfns :(