Ttc while bf and no period yet

So my son is 13 months old and we are starting to want to have another baby but wondering when to expect my period back. I’ve been attempting to wean for about a month now but my son refuses to give up nursing for naps/bed/middle of night wake ups. This week I’ve cut it down to just before his now 1 nap and before bed. He’s been waking up 1-2 times a night for a couple weeks now too though...I’ve also been testing for ovulation for a few weeks but no positives yet....I keep having cramps like my period is coming but nothing so I’m starting to get annoyed.Anyone else with similar insight or experiences??