BFN AND NO AF IN SIGHT. DESPERATE AND NEED ADVICE ASAP PLEASE

Sarah • I`m 32 years old and TTC my first child. My S/O is 39 & has a 16yr old so we are trying for one of our own. Very excited
I went off BCP on Jan 30th (that is when I took my last one) I got my period as scheduled on Feb 2nd then ovulated on the16th. I got my AF again March 5th then ovulated the 18th of March. AF was scheduled the 30th of March but here we are April 4th and still nothing. I took 100 pregnancy tests...HCG strips, first response and dollar store pregnancy tests. How much longer should I give it before I call the OBGYN and ask for a blood test? I know I have seen people say the HPT's say negative but then they went for blood test and it came back positive? I am having EWCM like super thick and stringy (but my LH tests are all negative too), sore breasts really bad and other symptoms of pregnancy which sometimes can be confused with AF. Anyone have ANY advice or ANYTHING?! I'm going OUT OF MY MIND with all these negative results 😪😔