OK I have some questions about do's and don't of training for multiple events. I see how many of you do triathlons so I would appreciate any advice anyone has to offer.

I am first of all training for road racing season and the weather is total crap here in Indianapolis so I can't really get outside right now. So.... to offset this I have started swimming and weight training these last two weeks. I have been running for about 6 months now and I'm training for a half marathon in May. I am noticing that my mileage for running is actually getting less because I am feeling awful during my runs??? Super sore and heavy, stiff legs. I wonder if the swimming is playing a part in my agony? Weight training I've done a lot over the years so I kinda know what to expect with that but I've not combined these things before. I have only done road racing and am branching out into some new things this year. What do you all think, is this normal because I'm changing things up or am I overdoing it? I've been swimming 2X a week for about 45 minutes to an hour. I usually lift on the days I run. I alternate swim and run/lift days. Then one day a week I try to work in some cycling outside. It seems the running has helped my cycling but since I've added the swimming and lifting I have felt weak on the bike too? This is very discouraging and I'm just not sure what to do.