Chances of chemical?

Marina • TTC #2. 3yo beautiful girl July 2019

Got BFP on FRER and clinical guard since 10DPO (wasn’t testing before then). Have had positives on a lot of different kinds of tests but don’t see any progression on the clinical guard, and then barely even a line on the wondfo (bottom). Since my positive I’ve been having a lot of cramping and low back pain (usually only happens while I’m bleeding on my period) and insomnia. What do you all think? Am I just being neurotic or is it reason to worry?