HELP PLEASE! :(

i dont know whats going on.

it took 4 years of trying to get pregnant with my first child and we have been ttc for 6 months now. last month we had a chemical pregnancy i was devastated as i watched the lines fade to nothing and then started my period on june 3rd it isnt always perfectly regular some 21-22-23 cycles nothing crazy and they are always 4 days. went to my Dr on the 8th and blood test said hcg was gone and we could try again so i started ovulation tests waiting for the magic time and out of nowhere on the 15th i get brown blood that was only spotting it lasted like that until early the 17th when it started turning red and ended on 18th just like my normal cycle i made an appointment but couldnt get in till july5th so i started ovulation tests again and last night (june 23rd) i got close to a positive and double checked with a clearblue but still got a negitive this morning (june 24th) i tested and the line is lighter whats going on did i miss it did my body change its mind? im so lost