Ttc help???

Me and my husband are trying to conceive for the second time. We have a 14 month old and I so badly want to give him a brother or sister. We did the deed 2 days before ovulation and on ovulation and after ovulation. I'm having so many symptoms .. But I don't know if I'm psychologically making myself think I am. I'm 8dpo and I've been testing negative. Af is due the 30th  ..! When would be the best time to test? And anyone else having sumptoms so early??