Little precum dried on finger 5-10 minutes outside. period week after, bloating, lower back pain, fatigue, tension headache, nausea, uti/stress/preg?

Recommend seeing MD: All your symptoms could be related to stress, like you suggested, but it would still be wise to rule out other causes, especially if you haven't had any lab work lately. It's always better to be safe than sorry. Would be good to discuss different choices for contraception too in order to reduce risk of unplanned pregnancy.

Not preg: If you got your period - you are not pregnant. A UTI could happen, but you don't mention urinary symptoms - they are common but not necessary. Stress is something you might know of. It can merely be a collection of symptoms - not feeling well - malaise - it happens to people all the time. But you are not pregnant this time. If it matters - use protection for any sex - even precum can hold sperm.

Here are some ...: The scenario as described poses no chance to conceive. Of course, if in doubt for pregnancy, still do HPT (home pregnancy test) soon after missing the expected period; if (-) or still in doubt, repeat it in one wk. But, for your clinical situation, you should talk with your parents and seek medical attention timely so to find out what may cause your current symptoms beside concerning pregnancy.

Not pregnant.: It could be stress and UTI . See your doctor to confirm it.