Hi....sorry this is so long but you need to know all details to give me a good answer!

Hey all I'm some months shy of 20 (scary!) and have just started having sex for the first time with my sweet and unbelievably patient boyfriend. We have only been using condoms but I'm now sorted with the pill (microgynon 30) as I definitely cannot be pregnant at this point (in middle of uni degree and have strict parents who assume I'm sexually active now and would be okay with that but DEFINITELY NOT okay with a pregnant daughter now). We've discussed contraception and decided that we'll use condoms + pill at all times just to be extra safe. Both getting screened for chlamydia too as he's had sexual partners before and 'cause I've given oral without a condom (bit silly i know)...and 'cause I'm very paranoid in general.

Anyway...went to doc's when period had been delayed by a week and he said condoms were good for practicing safe sex but not THE best for avoiding pregnancy - naturally this scared me a wee bit as we have had sex a few times with only condoms and as its becoming a regular thing I knew I had to get myself sorted on pill asap. Another week has passed and period has yet to appear...I have taken 7 pregnancy tests (! - all spread out over the past weeks) including a first response and a doctor's (urine) test ...all have been negs but the waiting is still making me so anxious! Saw same doc today and he reckoned stress must have delayed my period as I recently moved house and am working 2 new jobs to pay off last year's student overdraft and utility bills and have been sick since moving in (allergic to house dust and severe coughing and wheeziness) and obv stress of suspected unwanted pregnancy. I have had protected sex twice since I saw the doctor last week and I still worry! :S So how soon after conception can a HPT detect the HCG hormone? Should I stop having sex altogether with my bf for a week and test in a week's time to be absolutely sure even if period arrives? Cause the microgynon packet says I should start packet on first day of menstruation but it seems like mine doesn't want to arrive! Doc says I can start immediately but should use condoms at the same time - what should I do as I need to know where i stand with my periods, though this option seems more preferable as obv I don't have to abstain for a week (:-P).

Also, my bf has slight ED but sex is still great anyway and he has only ejaculated (with condom on obv) once whilst inside me and there have been no breakages or leaking at all. We know about precum risk so he always puts a condom on before our genitals get close. Considering all these odds, how likely is it that I am actually pregnant? I just want my periods back to normal! And when should I start my pill? Will I be okay to start now and continue using condoms?

Thanks so much! xxx