STD Questions

[Brydoclarke]

Hi all,

I would be grateful for any advice. Earlier tonight I had unprotected sex with a woman I met for the first time. Tonight I had been drinking and in the heat of the moment I failed to take precautions. I the intercourse lasted no longer than 3 minutes, in truth I would be surprised if it lasted longer than one minute, I ejaculated inside her (not worried about pregnancy as she assured me she is on the pill), later (minutes after we had finished) she got her period. I had no blood on me so I presume that I've not came into contact with the menstrual blood.

In the past outside of relationships I've always been careful so I've never worried about STDs or passing them on to someone. It would be entirely hypocritical of me to be judgemental, but as she never asked me to take precautions I presume that she has not asked other partners to do the same. With that in mind I'm very worried that she could have picked up something that I may have caught something. Short of her behaviour with me I've no reason to think that she may have anything.  

I wondered if more learned people than myself could answer a few questions. Firstly - does the length of contact matter? I understand that STDs can be passed the first time you come into contact with someone or may not be passed after 100 times, but I wasn't sure if the length of time was a factor. Also, if she was menstruating while we had intercourse would that increase the likelihood of me picking up something? Finally I wondered how long I should wait before I get a test. As far as I can tell some of the most common stds where I am in the UK - chlamydia and gonorrhoea, can be tested for relatively quickly. However I understand that more serious things like HIV take longer to show.

Thank you very much for taking the time to read this and I'm very grateful for any advice and answers you can offer.