Hi dear,

At the outset I wish to state that your history is inconclusive. I wish you had included topics like nature of pain, movts which precipitate pain, relieves pain, whether it is all thru or only with activity etc.
From your descriptions, it looks like you had DOMS initially. DOMS stands for Delayed Onset Muscle Soreness. DOMS responds well with rest and sports massage.
Regarding your present state, since you pushed yourself
1. Fairly long distance before full recovery &
2. Without proper/lack of warm-up
the chances of further injuring (eg. grade1 to grade 2 or 3) your musculo-tendinous soft tissues of your thigh segment is high. Without evaluating you, I will not be able to comment on which particular musculoskeletal segment is involved.

Regarding treatment I do agree with Jonathan that rest is necessary, although 2 weeks is the old school of thought. Try to be active as soon as your subjective symptoms (eg.pain) get better.
Please include mild self stretching techniques within the limits of pain along with your treatment plan prescribed initially.
Always remember sense of instability is a red alert, if it worsens do seek a specialist consultation.
Above all take it easy, your psyche has a very big role to play in your recovery. all the best, get well soon.

Keep me posted.

Cheers,
Thomas