time for docs?

Debs
So now I'm 12 days late, 3 negative tests but still feel like I could be. Spotted a little blood maybe 5 days after ovulation for only a few days and had mild tingly cramps for that next week (but no blood) period never showed. Also felt sicky/ sore boobs but now more or less all of them symptoms have gone away apart from the occasional twinge. What should I do now? I really feel like I could be pregnant but feel like the docs are just gonna turn me away. Do uk docs do blood tests? Or should I wait a bit longer and book into a private clinic for a blood test? Advice needed 😩😩