Advice please!

Jennifer • My husband and I are trying for a baby! We have 2 girls, and are trying for a son (another girl would be ok too, but we really want a boy). I heard about this app and wanted to give it a try. =)
Me and my husband have been trying to conceive for about 4 to 5 months now. Oct 31-Nov 2. It was very light, and I am usually on period 5 days. (It started at 40 days, instead of my usual 30). 2 tests, negative. Well I started my period again...day before thanksgiving and off today. Should I get ovulation kit? What brand is preferred? We have 2 daughters, trying for our son. Any advice on getting prego faster is appreciated =)