overtrained, DOMS or still something else?

Hi all,

I'm new to the forum and in first instance I joined because i'm worried about my form at the moment.

I'm cycling for a little more than a year now, and since january I am preparing for a 3day event with days of around 160km and lots of climbing in the Belgian Ardennes and Luxemburg starting the 10th of May.

I gradually increased my training, taking a relative rest week every fourth week. Everything was going fine, I felt I was getting stronger and during the first weeks of april I noticed for the first time I could keep riding in the big chainring on a flat road in heart rate zone 2 for quite a while.

In the weekend of 21 april I joined Liege-Bastogne-Liege (150km), which went very well, and the day after I did another 150k , with a little less climbing, but still some short climbs. That second day was very hard, both mentally and physically, but it went OK. I also probably didn't eat and drink enough that second day, the tiredness of the first day made me a little unfocused.

After that (so last week) I had my relative rest week with only 3 hours of easy cycling during the week, and 4 hours of relatively easy cycling during the weekend. It went horrible ... And still today (1/05) I"m not able to ride at a decent pace in heart rate zone 2, and if I go into higher heart rate zones, my legs hurt immediately. I never had this before, at least not so many days later. So I'm getting kind of worried because the big event is coming up soon.

I wonder what you guys think, am I overtrained, is it severe DOMS (with severe I mean long lasting), or could it be still something else?
And if you have an idea what it could be, do you have an idea of how to proceed?

Thanks as lot!