How can we try for a baby if I'm in-sucure

So every night for the past 3 years my partner has always come home apart from twice. Those two times bad things had happened the first time he kissed another women (we was seeing in each other wasn't serious) the second time he was spiked on a night out and didn't manage to get home till following day. Well last night there was no call no answer when I call and he didn't even come home. The one night he's away my so called friend who's obsessed with him messaged me to ask if where still together then tried to make out she was asking how's our life going. I'm not sure if I'm over thinking or is this just plan dodgy! And I no there will be a stupid excuse of "I fell asleep" yet like I said he's never slept away from home in ages. Could the stress of trying to have a baby be causing my brain to play tricks on me!