Scared-my baby dragon had a little blood in her stool....!!!

[StLDragonMaster]

She is 8inches long. The breeder i bought her from (thinks she was born around the 1st of sept.) which is total Bull Sh#t ! Trust me if I would of know about his calendar keeping prior to purchase I probably would not of bought from him. Q..1 is 8 inches normal size for a female beardie at 4 months? Q..2 can feeding her too much vitamin supplement cause her an ulcer? The brand is Repashy superfood Bearded Dragon calcium plus with D3. I feed her this two days in a row with one feeding a day through a mix up with me and my g/f..( Yes I still love her !! .....3..I had a friend feed her 1 day over Xmas and Im worried he may of over feed her too many crickets during one feeding! ..Q.4 If it is parasites wouldn't it have showed up sooner?... Q5 could it have anything to do with the new water conditioner I put in her spray bottle she drinks from? Its zoomeds Reptisafe, but I highly doubt this! .... Last but not least Q6 I changed her Uv tube from a repti glo 5.0 to a Zilla t8 desert 50 for 1 day before this happened. Those are the only changes that happened in a short period of time. I would appreciate as much input as possiable I've serched the archives and did not come up with much. Thank you, Since I 1st posted this there has been no more blood but she isn't eating much. Im hoping its because shes about to shed.