It's been few months since Nick at Nite hasn't had new episodes. Awkwardly starting this Wednesday and every Wednesdays 11PM (technically TVLand airs it) and will simulcast on Nick at Nite and NickMom. It will have new Soul Man as a lead-in.
Not Full House - Apr 15
How You Bike Me Now - Apr 22
My Stupid Sweet Sixteen - Apr 29

UPDATE: New Instant Mom tomorrow is not airing on Nick at Nite or TVLand. New episode has been pulled, and replaced it with repeat. Nick at Nite schedules are normal. But it's quite unclear for next week's schedule, since this was a last minute changes for this week.

UPDATE2: Starting Wed (Apr 15) Instant Mom will air new episodes every Wed. 11pm on TVLand and Nick at Nite. There's uncertainty of why new episode of Instant Mom on Wed Apr 8 has been pulled at last minute notice when it was last scheduled there..

Last night's new episode of Instant Mom aired on TVLand was at 11:30PM. That was a one time, airing new time because of 2 new episodes of Soul Man at 10:30PM and 11PM. Rest new episodes continue every Wed 11PM.

So it looks like TVLand schedule for 2nd wk of June hasn't been updated. theFutonCritic has not updated full June month premieres for TVLand/Nick.
Instant Mom almost next week new episode is Jun 3 11pm.

If no new episodes were scheduled after June 3, then that means there are 7 episodes left to finish for season 2!

The 2 new episodes of Soul Man was the actual season 4 finale. No word for TVLand whether or not Soul Man will renew for a fifth season.

New one hour special of Hot in Cleveland series finale will air Wed Jun 3 10PM. Because due to off the clock programming, and more commercials, new Instant Mom again placed at 11:30PM.

TVLand schedule updated for Wed Jun 10 and the rest which included classic sitcoms, and with Hot in Cleveland and Soul Man have already just finished series and seasons respectively, Instant Mom once again would be on hiatus for summer. Quite unclear for the future if Instant Mom would return for fall..