Short SF story rejected

My short story Unscheduled Stroll on Triton was rejected by Clarkesworld SF online magazine in one day's time.  That was the story that was an epilogue to my Higher Mission SF novel.  It wasn't submitted for inclusion in the novel.  My list of rejections are growing and I've not had an acceptance since Higher Mission late last year. My new SF novel The Silver Dart was turned down by the last agent because she wasn't taking unsolicited manuscripts.  This wasn't pointed out on her website.  A friend of mine who writes nonfiction has volunteered to look at my older novel The Vanishing Shed.  Already before reading it he has pointed out several concerns just from talking to me about the novel.  A good author friend, Gail, is about done with Higher Mission and is enjoying it.  So far I've only had one review of that novel.  A local friend wants a copy of my romance novel, A Change of Heart.  At least that is a plus and I needed that.