TTC 👶🏼👶🏼👶🏼👶🏼

My cycles are irregular and vary each month. The last two months have been 28 &29 but some prior to those have gone 30-34 days. I'm currently on CD30 and having some breast tenderness and had some nausea earlier this week along with somewhat of a spike of temp( I say somewhat because I don't keep track of BBT, just noticed my temp is higher than it normally has run). Just curious if anyone has advice on when to take a test. Been TTC for 4 months now and have had BFN in the past. I have PCOS, so each BFN gets harder and harder. I want to know asap because I'm impatient but also don't want to test too soon for the heartbreak. Thanks!