Thomas finished in the top 10 of Paris-Roubaix and the Tour of Flanders but seems to have spent a lot of time off his bike as well as on it.
The Team Sky rider did finish the race but thinks most of the crashes have been down to bad luck.
Thomas said, according to Cycling News: "I was moving up on the right and there was a curb and someone in the bunch swerved right to go for a leak and I just had nowhere to go.
"That rider took me out and I had a sore arse, back and hip. I felt like I couldn't get much out, so it's not ideal and it's frustrating because I've had a few crashes now and to be honest most of them have been down to pure bad luck."
"That's easy to say but I was taking a drink in Flanders and someone slammed on the brakes, I hit the curb and flew over the bars. Maybe I could have waited until we were out of the town before I took a drink. I don't know."
The Welshman has crashed four times recently but he believes most of them couldn't have been prevented.
The 27 year-old said: "I can see that if you look at four crashes then people are going to think 'what's he doing?'.
"But when you break them down and look at what's happened you think maybe one could have been prevented, but not a lot could have been done, and especially today. I just got taken out."
There are always more crashes and falls on the Cobbled Classics with the roads being narrower and the terrain harder. Riders seem to find it difficult to get themselves in the right position as there is not much room to manoeuvre.
Thomas admits that he was feeling drained after being involved in a lot of races recently but he wanted to compete in a race which he enjoyed watching as a young boy.
"It was mentally quite hard coming here. I wanted to race, I said at the start of the year that I wanted to be here because I've come out here and watched the race twice as a kid, but I feel like over those three weeks in Belgium I've slowly started to put a bit of weight on and felt a bit weird coming here.
"There are guys like Gerrans and Gilbert coming in and they're all ready and it just felt like I was a bit overdone. I still wanted to give it a good crack and help Swift and Boasson Hagen."
Edvald Boasson Hagen was Sky's highest placed finisher in 39th whilst BMC's Philippe Gilbert took the victory after he made a break three kilometres from the finish.
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