Without an autopilot wind conditions other than wind sheer/turbulence are hardly relevant as you are flying relative to the air mass. Wind is relative to the ground. Most a/c wind (sic) up in a spiral dive after a while although high stability types have been known to go on for a long time. Jet airliners are not particulaly stable as they rely on computers for some stability.
Wind will not cause two 90 degree turns.
No offence, but if your level of basic understanding of aviation is this low you should really post elsewhere.